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`Oumuamua, the first known interstellar asteroid, - Wook - 11-27-2017

That Interstellar Asteroid is Pretty Strange. Could It Be…?

By Corey S. Powell | November 23, 2017 10:36 am

[Image: eso1737a-1024x640.jpg]
Illustration of `Oumuamua, the first-known interstellar asteroid. Its unusual shape and color offer cryptic clues about the nature of objects from other solar systems. The challenge now is to find more of these messengers from the stars. (Credit: ESO/M. Kornmesser)
It isn’t aliens. It’s never aliens.
That’s the only sensible answer whenever astronomers spot something truly weird in space. That unusual radio blip from the planet Ross 128b? Not aliens. Potential SETI signal SHGb02+14a? Not aliens. The mysterious ‘alien megastructure’ star? Probably not aliens, either. There are so many unexplored natural explanations for unusual phenomena, and so many ways to make errors, that the starting assumption has to be no, no, a thousand times no, it is not aliens.
Then astronomers observed `Oumuamua, the first known interstellar asteroid, as it raced out of the solar system. Its wildly elongated shape resembles that of a rocket stage or–even more enticingly–the interstellar ship from Arthur C. Clarke’s science-fiction novel Rendezvous with Rama. Soon sober-minded reporters (including this one) were exchanging curious messages: Could this ‘asteroid’ actually be an alien artifact? How would we know?

Deep breath. Let’s take this one step at a time. On October 19, the automated Pan-STARRS 1 telescope (which is primarily intended to scan the sky for potentially hazardous, Earth-approaching asteroids) detected an unusual object. It was originally regarded as a possible comet, catalogued as C/2017 U1. By the end of the month, though, astronomers could clearly see that it was something much more remarkable.
First, the ‘comet’ had no fuzz; it was clearly not a comet but rather a fast-moving asteroid. It got a new designation, A/2017 U1 (A for asteroid). Much more intriguing, though, was its orbit. It was moving past the sun on a hyperbolic path, a trajectory indicating that it originated from beyond our solar system. It got another new designation, introducing a naming scheme never used before: 1I/2017 U1 (I for interstellar).
The Pan-STARRS team quickly picked a more apt name for such an important object. It’s now known as `Oumuamua (pronounced ‘oh-oo-moo-ah-moo-a’), a Hawaiian word that translates roughly as ‘messenger from the distant past.’
[Image: eso1737c-1024x923.jpg]
‘Oumuamua came from the direction of Vega. It’s now racing back out to interstellar space at 26 kilometers per second. (Credit: ESO/K. Meech et al)
Researchers had long theorized that space should be full of comets and asteroids ejected from other solar systems during their early days. Their models showed that planetary formation is a messy business, with many small objects kicked out as big proto-planets form. `Oumuamua is the first proof that they were right. It’s also our first direct look at an intact visitor (as opposed to dust specks) from another solar system.
We didn’t get much of a chance to study it, unfortunately. By the time `Oumuamua was discovered it was already past the sun, on its way back to the stars and off into the darkness. Astronomers at the world’s major observatories rushed to see what they could learn from it. They began amazing, rapid-fire studies. And what they found was…rather odd.
`Oumuamua rotates rapidly, every 7.3 hours. As it spins, its brightness changes drastically, indicating a highly elongated shape. Karen Meech at the University of Hawaii’s Institute for Astronomy concluded that the asteroid is about 400 meters long but only one tenth as wide. It’s shaped like a fat cigar, or maybe more like a fire extinguisher–an apt point of comparison, since the asteroid is also very red, similar to some of the objects in our solar system’s distant Kuiper Belt but also broadly similar to some metallic asteroids.
[Image: 1I_eso_lightcurve-1024x228.jpg]
Sharply varying brightness of `Oumuamua indicates a thin, tubular shape, like a more extreme version of known comets and asteroids…or like some fictional starships. Dots indicate brightness measurements; white dashes show the modeled light curve for a object 10 times as long as it is wide. (Credit: ESO/K. Meech et al)
Those unexpected traits caught the attention of a number of armchair scientists on Twitter, especially after the European Southern Observatory released a pair of evocative (albeit highly speculative) illustrations of `Oumuamua, including the one at the top of this post. Several leading researchers got drawn into the conversation as well.
The thing doesn’t look natural. So here we are again: Could it be artificial? How would we know?
First, there could be the obvious giveaways. It might be emitting radio signals or some other artificially modulated form of radiation. (We didn’t see that.) It might adjust its course in some way. (We didn’t see any deviation from a normal gravitational path.) It might give off a heat signature indicating some kind of engine or internal energy source. (We didn’t see that either, although nobody has looked at `Oumuamua in the far infrared.)
Then the chatter moved on to more elusive speculations. Could this be a dead, abandoned spaceship? Could it perhaps be instrumented but not actively powered? Jason Wright from Penn State summarized some of the conversation in a helpful, nicely skeptical blog post.
There are so many ET ideas to consider that it’s impossible to state with complete certainty that `Oumuamua is not somehow associated with an intelligent alien civilization. Still, Occam’s Razor says it’s unlikely that the very first object we ever see from interstellar space just happens to be a spaceship–a slow, inert, disguised spaceship–built by aliens. Aliens whom we have no evidence actually exist, incidentally.
Fortunately, we can do better than that. Andy Rivkin at Johns Hopkin’s Applied Physics Lab reminded me of a great test case. In 2002, astronomers noticed a small, fast-spinning object in an unusual Earthlike orbit. Spectroscopic observations revealed rough matches with aluminum and paint containing titanium oxide. The object was quickly identified as an Saturn V rocket upper stage, probably from Apollo 12.
[Image: ThirdStage-300x200.jpg]
A Saturn V third stage like the one discovered adrift in 2002. If something like this arrives from deep space, we will know. (Credit: NASA)
In other words, artificial objects tend to look artificial. Granted, we knew what to look for when trying to identify an Earth rocket. Granted further, an alien artifact that has been floating through space for millions of years could be heavily altered by radiation and micrometeorites. But still–there’s nothing about `Oumuamua that looks fake. Just weird.
Which brings me to the final, most exciting point. `Oumuamua is not the end of the story; it is just the beginning. The planet-formation models suggest that one to ten interstellar objects pass through our solar system every year! We haven’t seen them before because they tend to be fast and faint. New tools like the Pan-STARRS survey finally caught one that happened to pass especially close to the sun.
Future surveys will be more sensitive, and now scientists will be looking more actively for other visitors to see if they are like `Oumuamua or if they are something else entirely. The Large Synoptic Survey Telescope will be revolutionary in that regard. Right now, `Oumuamua is in a class of one. We don’t now if it is an outlier or if it is somehow typical of the objects that zoom past us from other star systems. Soon, though, we will have a whole catalogue of such objects to study and puzzle over.
We will learn about their compositions, their shapes, their trajectories through the galaxy. Already we can see from its motion that `Oumuamua does not seem to be associated with any of the nearby stars. We will see how many interstellar objects are rocky asteroids and how many are icy comets. We will begin to collect direct evidence of what happened to planets in other star systems, so we can compare their history to our own.
And maybe, must maybe–I know, I’m inching back onto the crazy train here–but if any of those objects show any sign of artificial origin, there’s an excellent chance we’ll know that, too.
Follow me on Twitter for the latest science news: @coreyspowell

CATEGORIZED UNDER: astronomy, comet, exoplanets, extraterrestrial life, NASA, select, solar system, space, stars, Top Posts, Uncategorized
MORE ABOUT: alien life, interstellar, SETI

RE: `Oumuamua, the first known interstellar asteroid, - Vianova - 11-27-2017

400 meters long
40 meters wide

Full of winged shape shifter vampires in hibernation   Reefer

The spacecraft swung by to deploy the ... harvester colony   Damned

Relic spacecraft.
Do Not Enter.

[Image: lifeforce_01.jpg]

Lifeforce movie.
... remember the alien's titties?



RE: `Oumuamua, the first known interstellar asteroid, - Vianova - 11-29-2017


SpaceX's Big Mars Rocket Could Help Chase Down Interstellar Asteroid

Quote:The new study was conducted by researchers with Project Lyra, 
which aims to assess the feasibility of a mission to rendezvous with or fly by 'Oumuamua. 

SpaceX's huge Mars-colonization rocket.

That rocket, called the BFR, 
could launch a probe toward 'Oumuamua, 
the interstellar asteroid that zoomed past Earth last month, a new study suggests.

The 1,300-foot-long (400 meters) 'Oumuamua 
is currently speeding away from us at about 58,160 mph (93,600 km/h, or 26 km/s). 
That's far faster than any spacecraft has ever traveled upon escaping Earth 
(though some have gone faster as they approached big bodies, such as the sun). 
But a mission employing the in-development BFR, 
with speed-boosting flybys of Jupiter and the sun, 
could theoretically chase 'Oumuamua down, the study said. 

"The KISS Interstellar 
Medium study computed that a hyperbolic excess velocity of 70 km/s was possible via this technique, 
a value which achieves an intercept at about 85 AU in 2039 for a 2025 launch,"

"More-modest figures can still fulfill the mission, 
such as 40 km/s with an intercept at 155 AU in 2051," the authors added. 
"With the high approach speed, a hyper-velocity impactor to produce a gas 'puff' 
to sample with a mass spectrometer could be the serious option to get in-situ data."

But the BFR is not the only option for an 'Oumuamua mission, the study authors wrote. 
Tiny, laser-propelled sail craft, like the ones the $100 million Breakthrough Starshot
project aims to launch to other star systems, could do the job as well.

Project Starshot would be the flexibility to react quickly to future unexpected events, 
such as sending a swarm of probes to the next object like 1I/'Oumuamua,"

"With such an infrastructure in place today, 
intercept missions could have reached 1I/'Oumuamua within a year," they added.

Even if an 'Oumuamua mission never comes to pass, 

astronomers could still get an up-close look at a visitor 
from another solar system in the not-too-distant future: 
Such interstellar interlopers may zoom through the inner solar system as often as every year or so,


RE: `Oumuamua, the first known interstellar asteroid, - Wook - 11-29-2017

The name comes from Hawaiian ʻou.mua.mua, meaning "scout",[22] (from ʻou, meaning "reach out for", and mua, reduplicated for emphasis​, meaning "first, in advance of"[4]) and reflects the way this object is like a scout or messenger sent from the distant past to reach out to us.[4][23] The first character is a Hawaiian ʻokina, not an apostrophe, and is represented by a single quotation mark and pronounced as a glottal stop; the name was chosen by the Pan-STARRS team[24] in consultation with Kaʻiu Kimura and Larry Kimura of the University of Hawaii at Hilo.[25]

RE: `Oumuamua, the first known interstellar asteroid, - EA - 12-01-2017

Star Seed
Directed Banana_hump Panspermia
[Image: eso1737a-1024x640.jpg]
Eye thought it was pronounced:`Oumuamua @~19.5

[Image: 26086588.jpg]
(Not Directed like skitter skatter )
[Image: the-origin-of-life-23-7281.jpg][/url]

Applying 21st century technology to the design and development of a hypothetical extra-terrestrial colonisation programme,  Smith and Sleator reimagine directed ‘panspermia‘ from the perspective
of Crick and Orgel’s’ technological society’,  44 years after the publication of their original.

Seeds Of Life In Space (SOLIS): The Organic Composition Diversity at 300–1000 au Scale in Solar-type Star-forming Regions*

Complex organic molecules have been observed for decades in the interstellar medium. Some of them might be considered as small bricks of the macromolecules at the base of terrestrial life. It is hence particularly important to understand organic chemistry in Solar-like star-forming regions. In this article, we present a new observational project: Seeds Of Life In Space (SOLIS). This is a Large Project using the IRAM-NOEMA interferometer, and its scope is to image the emission of several crucial organic molecules in a sample of Solar-like star-forming regions in different evolutionary stages and environments. Here we report the first SOLIS results, obtained from analyzing the spectra of different regions of the Class 0 source NGC 1333-IRAS4A, the protocluster OMC-2 FIR4, and the shock site L1157-B1. The different regions were identified based on the images of formamide (NH2CHO) and cyanodiacetylene (HC5N) lines. We discuss the observed large diversity in the molecular and organic content, both on large (3000–10,000 au) and relatively small (300–1000 au) scales. Finally, we derive upper limits to the methoxy fractional abundance in the three observed regions of the same order of magnitude of that measured in a few cold prestellar objects, namely [img=0x0][/img]–10−11 with respect to H2 molecules.

Wickramasinghe Days

RE: `Oumuamua, the first known interstellar asteroid, - rhw007 - 12-01-2017

Bob... Ninja Alien2

This video is LONG version

Bob... Ninja Alien2

RE: `Oumuamua, the first known interstellar asteroid, - Wook - 12-01-2017

Cool !

RE: `Oumuamua, the first known interstellar asteroid, - Vianova - 12-03-2017

If that elongated poo shaped aster-rhoid Lol
were a spacecraft,
it is going awfully slow for occupants to get anywhere.
If it were an interstellar alien probe,
then it may be slowing down while doing a Fly  Hi Bye
and using advanced systems technologies,
to gather solar system data.

In any concoction of speculations on the object being artificial,
then the obvious course of action is to extrapolate the direction,
that it took out of the solar system,
and determine the next statistically nearest  star system {s},
that it would possibly pass by or through.

I imagine that some scientists have already speculated in that direction.


RE: `Oumuamua, the first known interstellar asteroid, - EA - 12-12-2017

Has an alien probe entered our solar system? Cigar-shaped interstellar 'comet' Oumuamua is being investigated for signs of extraterrestrial technology
  • Astronomers are set to scan an 'alien' comet for signs of extraterrestrial signals
  • The cigar-shaped object, named 'Oumuamua, sailed past Earth last month
  • The mysterious comet is the first interstellar object seen in the solar system
  • Now a team of alien-hunting scientists led by Russian billionaire Yuri Milner is scanning the object for radio signals
By Harry Pettit For Mailonline [/url]
Published: 17:20 GMT, 11 December 2017 | Updated: 11:33 GMT, 12 December 2017
Astronomers are set to scan an 'alien' comet for signs of extraterrestrial technology.
The cigar-shaped asteroid, named 'Oumuamua by its discoverers, sailed past Earth last month and is the first interstellar object seen in the solar system.
A team of alien-hunting scientists, led by Russian billionaire Yuri Milner, will scan the comet this week before it sails beyond the reach of Earth's telescopes.
They say they are looking for radio signals, claiming the mysterious visitor could be an alien spaceship.
Scroll down for video
[Image: 468BE61D00000578-0-image-a-1_1511199121328.jpg]+3

Astronomers have begun scanning an 'alien' comet for signs of extraterrestrial technology. Researchers say they are looking for radio signals, claiming the mysterious visitor could be an alien spaceship

The alien-hunting project will use the Green Bank Telescope in West Virginia for its investigation, with the campaign set to begin at 3:00pm ET (8:00pm GMT) on Wednesday.

The telescopes sensitive equipment would would take less than a minute to pick up something as faint as the radio waves from a smartphone, according to the
Milner, the business mogul behind Breakthrough Listen, a $100 million (£75m) search for intelligent extraterrestrial life, received an email about the object last week from one of his chief scientists.
'The more I study this object, the more unusual it appears, making me wonder whether it might be an artificially made probe which was sent by an alien civilisation,' Professor Avi Loeb, the chair of Harvard's astronomy department and one of Milner's advisers on Breakthrough Listen, wrote in the email.
Professor Loeb said the space rock's peculiar elongated shape is odd for a common space rock but ideal for a ship flying between star systems.
Breakthrough Listen has now announced the program will scan 'Oumuamua this week for signs of radio signals.

A cigar-shaped comet named 'Oumuamua sailed past Earth last month and is the first interstellar object seen in the solar system. 
It was first spotted by a telescope in Hawaii on 18 October, and was observed 34 separate times in the following week.
Travelling at 44 kilometres per second (27 miles per second), the comet is headed away from the Earth and Sun on its way out of the solar system. 
The comet is up to one-quarter mile (400 meters) long and highly-elongated - perhaps 10 times as long as it is wide. 
That aspect ratio is greater than that of any asteroid or comet observed in our solar system to date.
But the comet's slightly red hue — specifically pale pink — and varying brightness are remarkably similar to objects in our own solar system.

Read more:
Follow us: @MailOnline on Twitter | DailyMail on Facebook


RE: `Oumuamua, the first known interstellar asteroid, - Wook - 12-13-2017

Strange tumbling motion of cigar-shaped interstellar 'comet' Oumuamua suggests it’s an alien probe with BROKEN engines, says leading astronomer
Oumuamua is a cigar-shaped asteroid that passed by Earth last month
Dr Jason Wright suggests that it could be sent by an alien civilisation
He claims that object's movement is the same as a craft whose engines failed
Today, scientists led by Professor Stephen Hawking will use high-tech scanners to discover if Oumuamua was sent by an alien civilisation
By Shivali Best For Mailonline 
Published: 09:11 EST, 13 December 2017  | Updated: 10:04 EST, 13 December 2017

RE: `Oumuamua, the first known interstellar asteroid, - Kalter Rauch - 12-13-2017

I thought anything on a hyperbolic trajectory
around the sun is from interstellar space...
like some comets?

RE: `Oumuamua, the first known interstellar asteroid, - rhw007 - 12-13-2017

The Milky Way Galaxy ( our home galaxy ) is spinning, we are a "captured" solar system going up and down around it's rim, as both the galaxy and our solar system rotate and zip through the Universe.  Who knows what kind weird stuff is out there waiting for us to do our OWN fly-bye Hi 

Maybe that thing was just rolling along the Milky Way edge and our solar system grabbed it as we went flying by?

Bob... Ninja Alien2

RE: `Oumuamua, the first known interstellar asteroid, - Vianova - 12-14-2017


Quote:I thought anything on a hyperbolic trajectory
around the sun is from interstellar space...
like some comets?

The shape of the object ... makes it a phenomena that negates the terminology "anything", 
in your comment.
It is not acting like a spacecraft that would be under conscious control,
is the consensus,
but what do they know about alien spacecraft?

The premise is ... relic craft ... careening through this section of the galaxy.

Whatever it is, it is far more important than ... MU69 for instance.
If you could prioritize,
a space mission,
with a choice between MU69 {that New Horizons in blundering after},
and this interstellar object,
it's a no brainer,
where you fly that mission.

You go after the oddball interstellar object that makes no common sense,
and is relatively unexplainable.

Whatever data --- independent research teams can obtain on this object,
is invaluable.
NASA will be conducting more secretive study and analysis no doubt.

RE: `Oumuamua, the first known interstellar asteroid, - rhw007 - 12-14-2017

Also just because it's tumbling does NOT ... REPEAT does NOT provide ANY "scientific evidence" that it is "out of control".

THIS IS AN ALIEN SHIP ... it could have ONLY started tumbling AFTER it passed Earth since the Frackers NEVER SAW IT COMING PERIOD in the 1st place.

The could mean that after getting close to it's target it has made a change in operational orientation to gather as much information on it's way out, or could be a normal Free-Fall rolling Zero G environment to allow reproduction, broadcasting on an UNKNOWN manner that REQUIRES the tumble ( in Zero G ) to mass scatter that information.

AGAIN one more the Nasal Aloof Senseless Aristocrats have their minds already made up and have so many of the holes in the head filled with the CEMENT of the PAST and are Physiologically UNABLE to think "out side their skull" in a faster man than Neanderthal Astrobiologists Suddenly Annihilated & Jointly Painting Lies

Bob... Ninja Spacecraft

RE: `Oumuamua, the first known interstellar asteroid, - letosvet - 12-14-2017

Alien spacecraft from stone age ... ? naah .. just a stone

Will we ever see aliens ? Whats the chanche 1:1000000000000000000000000000000000000000000  ?

RE: `Oumuamua, the first known interstellar asteroid, - Vianova - 12-16-2017

Interstellar scientific caca Whip
Ejection of rocky and icy material from binary star systems: 
Implications Lol for the origin and composition of 1I/`Oumuamua

Quote:In single star systems like our own Solar system, 
comets dominate the mass budget of bodies that are ejected into interstellar space, 
since they form further away and are less tightly bound. 

However 1I/`Oumuamua, the first interstellar object detected, 
appears asteroidal in its spectra and in its lack of detectable activity. 
We argue that the galactic budget of interstellar objects like 1I/`Oumuamua 
should be dominated by planetesimal material 
ejected during planet formation in circumbinary systems  Nonono 
rather than in single star systems or widely separated binaries.

We further show that in circumbinary systems, 
rocky bodies should be ejected in comparable numbers to icy ones. Hmm2

This suggests that a substantial fraction of additional interstellar objects discovered in the future 
should display an active coma. 
We find that the rocky population, of which 1I/`Oumuamua seems to be a member, 
should be predominantly sourced from A-type and late B-star binaries.


RE: `Oumuamua, the first known interstellar asteroid, - Keith - 12-17-2017

It's a 'coverup' from the start
even the name...
1I Oumuamua
like Horus you mean?
but... then
why would they lie about the name?
Oumuamua does most definitely not mean "messenger from afar" or any other hokey doke bullshit they've said it means
but this-
From the Hawaiian dictionary
[Hawaiian Dictionary(Hwn to Eng)]
n. Leader, as in battle or other activity; scout.

So we just got scouted by Horus the One-eye
and it looks a lot like Rama
or maybe the planet destroyer from Star Trek

lots of craziness around Oumuamua
like its shape..
80m diameter, 800m long
and it tumbles on its central axis, appearing to blink like a ... beacon

It swooped right in out of somewhere near Vega- (I'll bet you it will turn out to be rather closer to Tabby's, where there's probably a megacivilization)

shot right by doing the hyperbolic slingshot timewarp and got a good view of us all as it did..

How did a pencil shaped tumbling rock exposed to those forces not come apart at the center?

maybe when it is exactly as its namesake implies

They don't name shit something then lie about it for nothing.
not much gets Dr. Hawking hopping... and he's about to run around the congregation ... praise Jebus!
We have a sister planet in ruins
and reason to be cautious
and they want to chase it down and hit it with an impactor!
are they F'in serious???

RE: `Oumuamua, the first known interstellar asteroid, - Wook - 12-18-2017

RE: `Oumuamua, the first known interstellar asteroid, - Tarius - 12-18-2017

Honestly, I doubt we will ever truly know what it is unless someone goes playing catch up with it. All we get is a surface view of the thing and that only gives you so much data. The thing could be a snowball on the inside and might never know it because its covered in a half meter of dust and ice.

Really, I dont think it matters if we did chase it down or not. If there was someone looking for people and that was s probe, its already found us, its too late. So I think there should not be an issue with taking a closer look.

RE: `Oumuamua, the first known interstellar asteroid, - rhw007 - 12-19-2017

(12-17-2017, 06:40 PM)Keith Wrote: It's a 'coverup' from the start
even the name...
1I Oumuamua
like Horus you mean?
but... then
why would they lie about the name?
Oumuamua does most definitely not mean "messenger from afar" or any other hokey doke bullshit they've said it means
but this-
From the Hawaiian dictionary
[Hawaiian Dictionary(Hwn to Eng)]
n. Leader, as in battle or other activity; scout.

So we just got scouted by Horus the One-eye
and it looks a lot like Rama
or maybe the planet destroyer from Star Trek

lots of craziness around Oumuamua
like its shape..
80m diameter, 800m long
and it tumbles on its central axis, appearing to blink like a ... beacon

It swooped right in out of somewhere near Vega- (I'll bet you it will turn out to be rather closer to Tabby's, where there's probably a megacivilization)

shot right by doing the hyperbolic slingshot timewarp and got a good view of us all as it did..

How did a pencil shaped tumbling rock exposed to those forces not come apart at the center?

maybe when it is exactly as its namesake implies

They don't name shit something then lie about it for nothing.
not much gets Dr. Hawking hopping... and he's about to run around the congregation ... praise Jebus!
We have a sister planet in ruins
and reason to be cautious
and they want to chase it down and hit it with an impactor!
are they F'in serious???

Yes unfortunately, they are that FRACKING SERIOUS !!!

Nastiest Angry Scientists Alive / Jokingly Presenting Lies


MeanStream Media Mindless Minions Masticating Meaningless Misty Musty Munching Millionaire Moguls Mobsters Misleading Misdirecting Meandering Melodious Mush Missing Much reliably the lies into Sheep 

Now they are about to approve just a very FEW of the following ALLOWED concepts that are beyond the:


S   P   R   E   A    D            I    T           E      V     E     R     Y     W     H     E     R     E  

December 18, 2017 
NASA to Name Finalists for Future Solar System Mission

NASA will announce finalist concepts for a future robotic mission to explore the solar system during a media teleconference at 2 p.m. EST Wednesday, Dec. 20.
The mission, targeted to launch in the mid-2020s, would be the fourth in NASA’s New Frontiers portfolio – a series of cost-capped missions led by a principal investigator. Current New Frontiers missions are New Horizons to Pluto and the Kuiper Belt, Juno at Jupiter, and the OSIRIS-REx asteroid sample return mission, now heading to the asteroid Bennu for arrival in 2018.
Participating in the telecon will be:
  • Thomas Zurbuchen, associate administrator of NASA’s Science Mission Directorate in Washington
  • Jim Green, director of the Planetary Science Division at NASA Headquarters in Washington
  • Curt Niebur, New Frontiers program scientist at at NASA Headquarters
  • Principal investigators of the selected missions
The mission concepts were chosen from 12 proposals submitted in May to address top solar system exploration goals, as identified by the planetary science community. Investigations were limited to six mission themes:
  • Comet Surface Sample Return
  • Lunar South Pole-Aitken Basin Sample Return
  • Ocean Worlds (Titan and/or Enceladus)
  • Saturn Probe
  • Trojan Tour and Rendezvous
  • Venus In Situ Explorer
The teleconference will be streamed live on NASA’s website.
To participate in the call, media must email their name and affiliation to Dwayne Brown at by noon Dec. 20. Briefing materials will be posted at 2 p.m. at:

NO OTHER MISSIONS ACCEPTED  !!!  Also why ANOTHER SATURN probe when Juno is "broken" or PI is scared he's crapping his pants and they're spilling down between his toes?

What happened to getting BACK TO THE MOON as a MANNED BASE as Trump wanted?


How much more stupidity do we need to see before the NASA/DC swamp is DRAINED ????

Bob... Ninja Alien2

RE: `Oumuamua, the first known interstellar asteroid, - Vianova - 12-19-2017

Of the selection there,
I would choose Venus and Titan,
with Enceladus as the option.
Problem being,
I would do it differently at both locations than any NASA mission would.
I would put a lander of some sort on Venus and Titan and Enceladus.

NASA missions never fulfill or exceed all possible mission potential.
Mission potential is not part of the equation at NASA.
Mission excuses and disclaimers,
are the better part of NASA spin control mission potential. 

Seeing how the Ceres Dawn and New Horizon missions,
were abject failures in mission science potential,
no matter what they choose to do at NASA,
they will fuck it up with disclaimers and excuses of how and why,
they only know how to get there with absolute precision,
and then have to disappoint us with stupid decisions on mission parameters.

Once they get there with all that glorious scientific precision,
then science Whip  and common sense Nonono
have a sudden departure,
in NASA thinking,
and we all get disappointed by wasted mission potential.

Ceres Dawn ... stuck out at 240 km,
then given another chance,
and they bungle it again at 120 km.
New Horizons ... on it's way to do another Fly  Hi Bye,
leaving an unprecedented treasure trove of planetary science behind,
at the planet Pluto, and Charon.

It will be very interesting to see which objectives they choose for missions,
and then read what their plans are for those mission parameters.
No doubt, I will have to rip them a new asshole.

RE: `Oumuamua, the first known interstellar asteroid, - Vianova - 12-21-2017


Quote:carbon rich super hardened crust,

read between the lines,
more literature at the link

Quote:Oumuamua didn’t show signatures of ice or minerals found in rock,
which means it’s neither icy nor rocky, 
at least not exactly.  Doh

But it did show signs of carbon compounds. 
Fitzsimmons said previous studies have revealed that when carbon-rich, 
comet-like objects are exposed to the radiation that would be found in interstellar space, 
the material forms a crust that acts as insulation. 
If ‘Oumuamua has ice, as a comet would, 
it may be hiding beneath a mantle half a meter thick,
 formed after hundreds of millions—perhaps even billions—
of years of bombardment by high-energy particles.

When astronomers study the light reflected from the asteroid, 
they’re only examining the top few microns of its surface, 
a width smaller than that of a human red blood cell. 

 According to their thermal models, 
any ice buried 30 centimeters (12 inches) deep 
would have remained intact even as the surface of the asteroid 
reached temperatures of about 600 degrees Kelvin (620 degrees Fahrenheit) 
during its pass of the sun.

It could be icy inside, and we’ll never know,” Meech said.

The comet that's not a comet or an asteroid that makes any sense.
and the last statement in the above science article-- 
the summation of the ... scientist:

Quote:It could be icy inside, and we’ll never know,” Meech said.



RE: `Oumuamua, the first known interstellar asteroid, - rhw007 - 12-22-2017

They have NEVER stayed on the question of WHY they did NOT "see it coming" since they are 'supposedly' scanning 360 degree around the entire planet outward keeping an "EYE" for trouble-some objects hitting the planet?

IF it was likely 'tumbling' BEFORE swinging close to EARTH and then EXITING between Mercury and the SUN...


Maybe it was NOT tumbling at ALL this driving through Interstellar Space with ONLY the tip showing and NOT the 130 Meter STARTED to tumble AFTER flying past Earth and on it's way BACK to where it came from.

Just saying this thing is tumbling NOW for a reason, and was NOT TUMBLING (with a broken engine Sheep  )  UNTIL it went by EARTH.  Therefore NASA/JPL could be "forgiven" for not noticing it BEFORE it went past Earth.  They can only detect NOW BECAUSE of the Tumbling. 

What if NEVER tumbled until it got PAST it's target?   Or...missed its target...and is reporting back at some wavelength we have no clue about in our dumbed down planet?

Can we expect another attempt?   Holycowsmile 

Bob... Ninja Alien2

RE: `Oumuamua, the first known interstellar asteroid, - Vianova - 01-29-2018

I found this reference dated to jan 19.
Michele " let's have sex on Planet X " Bannister,
poet and astronomer,
who worked with Mikey Brown under the Uppsala telescope  Reefer
was quite busy traveling around the world,
watching this interstellar anomaly. 
That takes significant funding.
Good for her,
I hope they spend lots of money on her, she is a good resource of information for us.

Quote:A study of the asteroid’s photometry, 
led by Michele "let's have sex on Planet X" Bannister (Queen’s University Belfast, UK), 
used the Gemini-North telescope in Hawaii Whip
and the William Herschel Telescope in Spain Whip
to explore the asteroid’s shape and color. 

Bannister and collaborators refined the estimate of the asteroid’s shape
 to be at least 5.3 times as long as it is wide
which requires this body to have significant internal cohesion to hold together as it tumbles
Their measured color for ‘Oumuamua is largely neutral.

write us a poem sweet Hi  heart

more from the link:

Quote:Gregory Laughlin of Yale University and Konstantin Batygin of Caltech 
explore some of the consequences of ‘Oumuamua’s parameters. 
They argue that its current passage, if it’s not a fluke, 
suggests the presence of an enormous number of such objects in our galaxy alone — 
enough to account for two Earth-masses of material for every star in the galaxy. 

Flinging asteroids like ‘Oumuamua out into interstellar space isn’t easy, though; 
the necessary multi-body interaction 
requires the system to contain a giant and long-period planet like our Neptune or Jupiter. 
Taken together,
this information suggests that every star in the galaxy 
may host a Neptune-like planet at a Neptune-like distance.


RE: `Oumuamua, the first known interstellar asteroid, - Vianova - 02-16-2018

A very in depth article on the interstellar traveler.

lots of stuff on the tumbling rotational rate ... article is chock full of scientific disclaimers,
but tries to cover all the bases possible.

excerpts from the lengthy article
The tumbling rotational state of 1I/‘Oumuamua

Quote:Models of uniform rotation about a single spin axis 
moderately match 
1I/‘Oumuamua’s observed brightness variations within a few nights1,4,5,6,8. 
These models are inadequate Whip
for the six-night span of collated photometry we consider here 
(see Methods), 
with no single rotation period adequately matching the full set of data Nonono

Within the six-day span available, colour variations have been detected for 1I/‘Oumuamua, 
suggesting a compositionally varied surface. 
One of the red measurements, however,
is bracketed by three neutral measurements taken over a span of a few hours 
on modified Julian date 58052 (see Fig. 2b), 
which is difficult to explain through surface colour evolution. 

Rather, this colour sequence supports the idea of a spotted surface. 
Moreover, the idea of global colour evolution would require 1I/‘Oumuamua’s transition 
from red to neutral 
to occur entirely within the six-day duration of the observations, 
42–48 days after perihelion, 
in an unlikely serendipity of timing. 
It appears that 1I/‘Oumuamua’s surface is inhomogeneously coloured

the science  Doh

[Image: 41550_2018_398_Fig1_HTML.jpg]

Quote:The dashed line depicts the best nominal period of 6.831h. 
The tumbling model lightcurve (solid line), however,
 is an adequate representation 
(see Methods for comments on the quality of the model fit to the lightcurve minima). 
Data sources and filters in which observations were acquired1,4,5,6,8, 
including some reanalysed data (see Methods), 
are indicated. Error bars represent 1 uncertainties in the photometry. 
Modified Julian date 58051 corresponds to a Gregorian date of 25 October 2017.

the entire article borders on nonsense with all the disclaimers

RE: `Oumuamua, the first known interstellar asteroid, - EA - 02-16-2018

Possibly and IMO likely now The Russians imaged a doppleganger many moons ago @ Mars.

...This ain't the First Sheep Last...

At that proximity to their probe it was probably gravitationaly consumed by the micro-moon that was a brother to Oumuamua.

We can call it Oumarsmars.

[Image: Phobos-last-Transmission.jpg]

All the calculations never accounted for Improv nearly 31 years ago...

The Phobos Incident - Malfunction or Early "Star Wars"?
The last transmission from Phobos 2 was a photograph of a gigantic cylindrical spaceship - a huge, approx, 20km long, 1.5km diameter cigar-shaped 'mother ship', that was photographed on 25 March 1989 hanging or parked next to the Martian moon Phobos by the Soviet unmanned probe Phobos 2. After that last frame ...

It took two to tango/3 to entangle orbitally phased out of insertion angle.
Clearly phobos2 was destroyed in a bizzare "Roche Limit" and 3-body problem.

We have corroborating evidence of cylindrical bodies interacting with this system of things.

RE: `Oumuamua, the first known interstellar asteroid, - letosvet - 04-30-2018

A New Project Aims To Use The Center Of Asteroids And Turn Them Into Massive Starships

A new plan concocted by scientists and researchers at Delft University of Technology aims to take the center of hollowed-out asteroids and use these as the setting for what would be massive starships holding different generations of space travelers as they explore other solar systems.

RE: `Oumuamua, the first known interstellar asteroid, - Vianova - 05-03-2018

The hollowed out asteroids as a disguised spacecraft ... one could not tell from an external view alone.
If there was a super high tech civilization on ancient Mars,
I suppose that Phobos would be the first place they colonized after all.
Seems like if you have that kind of technology to retrofit an asteroid,
you would choose a nice sized asteroid to travel in.
But the need for "generations" :
Quote:massive starships holding different generations of space travelers as they explore other solar systems

may not be necessary with future propulsion systems like warp drives

Nonetheless, private asteroidal spaceship modules, or -- space bases --  may be in demand.
just park in orbit around the next planet ...

RE: `Oumuamua, the first known interstellar asteroid, - EA - 05-21-2018

Ninja  we have a long-term 'guest'   Alien2  in our system... Arrow

First interstellar immigrant discovered in the solar system
May 21, 2018, Royal Astronomical Society

[Image: firstinterst.gif]
Images of 2015 BZ509 obtained at the Large Binocular Telescope Observatory (LBTO) that established its retrograde co-orbital nature. The bright stars and the asteroid (circled in yellow) appear black and the sky white in this negative image. Credit: C. Veillet / Large Binocular Telescope Observatory 
A new study has discovered the first known permanent immigrant to our Solar System. The asteroid, currently nestling in Jupiter's orbit, is the first known asteroid to have been captured from another star system. The work is published in Monthly Notices of the Royal Astronomical Society: Letters.

The object known as 'Oumuamua was the last interstellar interloper to hit the headlines in 2017. However it was just a tourist passing through, whereas this former exo-asteroid—given the catchy name (514107) 2015 BZ509—is a long-term resident.

All of the planets in our Solar System, and the vast majority of other objects as well, travel around the Sun in the same direction. However 2015 BZ509 is different—it moves in the opposite direction in what is known as a 'retrograde' orbit.

"How the asteroid came to move in this way while sharing Jupiter's orbit has until now been a mystery," explains Dr. Fathi Namouni, lead author of the study. "If 2015 BZ509 were a native of our system, it should have had the same original direction as all of the other planets and asteroids, inherited from the cloud of gas and dust that formed them."

However the team ran simulations to trace the location of 2015 BZ509 right back to the birth of our Solar System, 4.5 billion years ago when the era of planet formation ended. These show that 2015 BZ509 has always moved in this way, and so could not have been there originally and must have been captured from another system.

[url=][Image: firstinterst.jpg]

Stellar nursery NGC 604 (NASA/HST), where star systems are closely packed and asteroid exchange is thought to be possible. Asteroid (514107) 2015 BZ 509 emigrated from its parent star and settled around the Sun in a similar environment. Credit: NASA / Hubble Heritage Team (AURA/STScI)

"Asteroid immigration from other star systems occurs because the Sun initially formed in a tightly-packed star cluster, where every star had its own system of planets and asteroids," comments Dr. Helena Morais, the other member of the team.

"The close proximity of the stars, aided by the gravitational forces of the planets, help these systems attract, remove and capture asteroids from one another."

The discovery of the first permanent asteroid immigrant in the Solar System has important implications for the open problems of planet formation, solar system evolution, and possibly the origin of life itself.

Understanding exactly when and how 2015 BZ509 settled in the Solar System provides clues about the Sun's original star nursery, and about the potential enrichment of our early environment with components necessary for the appearance of life on Earth.

[Image: 1x1.gif] Explore further: The stable retrograde orbit of the Bee-Zed asteroid explained

More information: F Namouni et al, An interstellar origin for Jupiter's retrograde co-orbital asteroid, Monthly Notices of the Royal Astronomical Society: Letters (2018). DOI: 10.1093/mnrasl/sly057

Journal reference: Monthly Notices of the Royal Astronomical Society Letters [Image: img-dot.gif] [Image: img-dot.gif]
Provided by: Royal Astronomical Society

Read more at:

RE: `Oumuamua, the first known interstellar asteroid, - Keith - 05-24-2018

isn't that something?
how better to get noticed...
going the wrong way 'round the maypole

in the orbit of jupiter...

AC Clarke was right!


RE: `Oumuamua, the first known interstellar asteroid, - slidika - 05-29-2018

Quote:letosvet wrote: Will we ever see aliens ? Whats the chanche 1:1000000000000000000000000000000000000000000  ?

By my calculations, you left off 1 zero at the end.    Thwak

RE: `Oumuamua, the first known interstellar asteroid, - EA - 11-01-2018

Quote:letosvet wrote: Will we ever see aliens ? Whats the chanche 1:1000000000000000000000000000000000000000000  ?

By my calculations, you left off 1 zero at the end.    [Image: thwak.gif]

After all, "the Ramans do everything in ~THR333's," right?
Quote:`Oumuamua, the first known interstellar asteroid,

7 minutes ago
[size=undefined]Last PostEA[/size]

Could 'Oumuamua be an extraterrestrial solar sail?
November 1, 2018 by Matt Williams, Universe Today

[Image: couldoumuamu.jpg]
Artist’s impression of the first interstellar asteroid/comet, “Oumuamua”. This unique object was discovered on 19 October 2017 by the Pan-STARRS 1 telescope in Hawaii. Credit: ESO/M. Kornmesser
On October 19th, 2017, the Panoramic Survey Telescope and Rapid Response System-1 (Pan-STARRS-1) in Hawaii announced the first-ever detection of an interstellar asteroid, named 1I/2017 U1 (aka, "Oumuamua). In the months that followed, multiple follow-up observations were conducted that allowed astronomers to get a better idea of its size and shape, while also revealing that it had the characteristics of both a comet and an asteroid.

Interestingly enough, there has also been some speculation that based on its shape, 'Oumuamua might actually be an interstellar spacecraft (Breakthrough Listen even monitored it for signs of radio signals!). A new study by a pair of astronomers from the Harvard Smithsonian Center for Astrophysics (CfA) has taken it a step further, suggesting that 'Oumuamua may actually be a light sail of extra-terrestrial origin.

The study – "Could Solar Radiation Pressure Explain "Oumuamua's Peculiar Acceleration?," which recently appeared online – was conducted by Shmuel Bialy and Prof. Abraham Loeb. Whereas Bialy is a postdoctoral researcher at the CfA's Institute for Theory and Computation (ITC), Prof. Loeb is the director of the ITC, the Frank B. Baird Jr. Professor of Science at Harvard University, and the head chair of the Breakthrough Starshot Advisory Committee.

To recap, 'Oumuamua was first spotted by the Pan-STARRS-1 survey 40 days after it made its closest pass to the sun (on September 9th, 2017). At this point, it was about 0.25 AU from the sun (one-quarter the distance between Earth and the sun), and already on its way out of the solar system. In that time, astronomers noted that it appeared to have a high density (indicative of a rocky and metallic composition) and that it was spinning rapidly.

While it did not show any signs of outgassing as it passed close to our sun (which would have indicated that it was a comet), a research team was able to obtain spectra that indicated that 'Oumuamua was more icy than previously thought. Then, as it began to leave the solar system, the Hubble Space Telescope snapped some final images of 'Oumuamua that revealed some unexpected behavior.

After examining the images, another international research team discovered that 'Oumuamua had increased in velocity, rather than slowing down as expected. The most likely explanation, they claimed, was that 'Oumuamua was venting material from its surface due to solar heating (aka. outgassing). The release of this material, which is consistent with how a comet behaves, would give 'Oumuamua the steady push it needed to achieve this boost in velocity.

To this, Bialy and Loeb offer a counter-explanation. If 'Oumuamua were in fact a comet, why then did it not experience outgassing when it was closest to our sun? In addition, they cite other research that showed that if outgassing were responsible for the acceleration, it would have also caused a rapid evolution in 'Oumuamua's spin (which was not observed).

Basically, Bialy and Loeb consider the possibility that 'Oumuamua could in fact be a light sail, a form of spacecraft that relies on radiation pressure to generate propulsion – similar to what Breakthrough Starshot is working on. Similar to what is planned for Starshot, this light sail may been sent from another civilization to study our solar system and look for signs of life. As Prof. Loeb explained to Universe Today via email:

"We explain the excess acceleration of `Oumuamua away from the sun as the result of the force that the sunlight exerts on its surface. For this force to explain measured excess acceleration, the object needs to be extremely thin, of order a fraction of a millimeter in thickness but tens of meters in size. This makes the object lightweight for its surface area and allows it to act as a light-sail. Its origin could be either natural (in the interstellar medium or proto-planetary disks) or artificial (as a probe sent for a reconnaissance mission into the inner region of the solar system)."

Based on this, Bialy and Loeb went about calculating the likely shape, thickness, and mass-to-area ratio that such an artificial object would have. They also attempted to determine whether this object would be able to survive in interstellar space, and whether or not it would be able to withstand the tensile stresses caused by rotation and tidal forces.

[Image: 1-couldoumuamu.jpg]
Artist concept of lightsail craft approaching the potentially habitable exoplanet Proxima b. Credit: PHL @ UPR Arecibo
What they found was that a sail that was only a fraction of a millimeter thick (0.3-0.9 mm) would be sufficient for a sheet of solid material to survive the journey through the entire galaxy – though this depends greatly on 'Oumuamua's mass density (which is not well-contrained). Thick or thin, this sail would be able to withstand collisions with dust-grains and gas that permeate the interstellar medium, as well as centrifugal and tidal forces.

As for what an extra-terrestrial light sail would be doing in our solar system, Bialy and Loeb offer some possible explanations for that. First, they suggest that the probe may actually be a defunct sail floating under the influence of gravity and stellar radiation, similar to debris from ship wrecks floating in the ocean. This would help explain why Breakthrough Listen found no evidence of radio transmissions.

Loeb further illustrated this idea in a recent article he penned for Scientific American, where he suggested that 'Oumuamua could be the first known case of an artificial relic which floated into our solar system from interstellar space. What's more, he notes that lightsails with similar dimensions have been designed and constructed by humans, including the Japanese-designed IKAROS project and the Starshot Initiative with which he is involved.

"This opportunity establishes a potential foundation for a new frontier of space archaeology, namely the study of relics from past civilizations in space," Loeb wrote. "Finding evidence for space junk of artificial origin would provide an affirmative answer to the age-old question "Are we alone?". This would have a dramatic impact on our culture and add a new cosmic perspective to the significance of human activity."

On the other hand, as Loeb told Universe Today, 'Oumuamua could be an active piece of alien technology that came to explore our solar system, the same way we hope to explore Alpha Centauri using Starshot and similar technologies:

[Image: 2-couldoumuamu.jpg]
IKAROS spaceprobe with solar sail in flight (artist’s depiction) showing a typical square sail configuration. Credit: Wikimedia Commons/Andrzej Mirecki"The alternative is to imagine that `Oumuamua was on a reconnaissance mission. The reason I contemplate the reconnaissance possibility is that the assumption that `Oumumua followed a random orbit requires the production of ~10^{15} such objects per star in our galaxy. This abundance is up to a hundred million times more than expected from the solar system, based on a calculation that we did back in 2009. A surprisingly high overabundance, unless `Oumuamua is a targeted probe on a reconnaissance mission and not a member of a random population of objects."

According to Loeb, that there's also the fact that 'Oumuamua's orbit brought it to within 0.25 AU of the sun, which is a good orbit for intercepting Earth without experiencing too much solar irradiation. In addition, it came to within 0.15 AU of Earth, which could have been the result of orbital corrections designed to facilitate a flyby.

Alternately, he states that it is possible that hundreds of such probes could be sent so that one of them got close enough to Earth to study it. The fact that the Pan STARRS-1 survey barely detected 'Oumuamua at its closest approach could be seen as an indication that there are many other such objects that were not detected, bolstering the case for 'Oumuamua being one of many such probes.

Considering that astronomers recently concluded that our solar system has likely captured thousands of interstellar objects like 'Oumuamua, this opens the possibility for future detections which could help prove (or disprove) the case for an interstellar light sail.

Naturally, Bialy and Loeb acknowledge that are still too many unknowns to say with any certainty what 'Oumuamua really is. And even if it does happen to be a piece of natural rock, all other asteroids and comets that have previously been detected have had mass-to-area ratios orders of magnitude larger than the current estimates for 'Oumuamua.

[Image: 3-couldoumuamu.jpg]
'Oumuamua as it appeared using the William Herschel Telescope on the night of October 29th, 2017. Credit: Queen’s University Belfast/William Herschel Telescope
That, and the fact that radiation pressure appears to be capable of accelerating it, would mean that 'Oumuamua represents a new class of thin interstellar material that has never before been seen. If true, that opens up a whole new set of mysteries, such as how such material was produced and by what (or whom).

While it has been beyond the reach of our telescopes for almost a year now, 'Oumuamua is sure to remain the subject of intense study for many years to come. And you can bet astronomers will be on the lookout for more of them! After all, "the Ramans do everything in threes," right?

[Image: 1x1.gif] Explore further: 'Oumuamua one year later

More information: Shmuel Bialy and Abraham Loeb. Could Solar Radiation Pressure Explain 'Oumuamua's Peculiar Acceleration? arXiv:1810.11490 [astro-ph.EP]. 

Source: Universe Today

Read more at:

Astronomers discover the giant that shaped the early days of our Milky Way

October 31, 2018, University of Groningen

[Image: 14-astronomersd.jpg]
Artistic rendering of Enceladus being devoured by a Milky Way-like galaxy. Credit: René van der Woude,

video at:  [Image: arrow.png]

Some 10 billion years ago, the Milky Way merged with a large galaxy. The stars from this partner, named Gaia-Enceladus, make up most of the Milky Way's halo and also shaped its thick disk, giving it its inflated form. A description of this mega-merger, discovered by an international team led by University of Groningen astronomer Amina Helmi, is now published in the scientific journal Nature.

Large galaxies like our Milky Way are the result of mergers of smaller galaxies. An outstanding question is whether a galaxy like the Milky Way is the product of many small mergers or of a few large ones. The University of Groningen's Professor of Astronomy, Amina Helmi has spent most of her career looking for 'fossils' in the Milky Way that might offer some hints as to its evolution. She uses the chemical composition, position and trajectory of stars in the halo to deduce their history, and thereby to identify the mergers that created the early Milky Way.

The recent second data release from the Gaia satellite mission last April provided Professor Helmi with data on around 1.7 billion stars. Helmi has been involved in the development of the Gaia mission for some 20 years, and was part of the data validation team on the second data release. She has now used the data to look for traces of mergers in the halo: "We expected stars from fused satellites in the halo. What we didn't expect to find was that most halo stars actually have a shared origin in one very large merger."

video at:  [Image: arrow.png]

PlaySeek00:00Current time00:29Toggle MuteVolumeToggle Fullscreen

The movie shows an N-body simulation of the merger of a Milky Way-like galaxy (with its stars in blue) and a smaller disky galaxy resembling the Small Magellanic Cloud in mass (with it stars in red). At the beginning, the two galaxies are clearly …moreThick disk

The chemical signature of many halo stars was clearly different from the 'native' Milky Way stars. "And they are a fairly homogenous group, which indicates they share a common origin." By plotting both trajectory and chemical signature, the 'invaders' stood out clearly. Helmi says, "The youngest stars from Gaia-Enceladus are actually younger than the native Milky Way stars in what is now the thick disk region. This means that the progenitor of this thick disk was already present when the fusion happened, and Gaia-Enceladus, because of its large size, shook it and puffed it up."

In a previous paper, Helmi had already described a huge 'blob' of stars sharing a common origin. Now, she shows that stars from this blob in the halo are the debris from the merging of the Milky Way with a galaxy which was slightly more massive than the Small Magellanic Cloud, some 10 billion years ago. The galaxy is called Gaia-Enceladus, after the Giant Enceladus who in Greek mythology was born of Gaia (the Earth goddess) and Uranus (the Sky god).

The data on kinematics, chemistry, age and spatial distribution from the native Milky Way stars and the remnants of Gaia-Enceladus reminded Helmi of simulations performed by a former Ph.D. student, some 10 years ago. His simulations of the merging of a large disc-shaped galaxy with the young Milky Way produced a distribution of stars from both objects, which is totally in line with the Gaia data. "It was amazing to look at the new Gaia data and realize that I had seen it before," says the astronomer.

 Explore further: New GAIA data reveals mergers in Milky Way

More information: Amina Helmi et al, The merger that led to the formation of the Milky Way's inner stellar halo and thick disk, Nature (2018).  DOI: 10.1038/s41586-018-0625-x

[1] Helmer H. Koppelman, Amina Helmi, Jovan Veljanoski: One large blob and many streams frosting the nearby stellar halo in Gaia DR2. APJ Letters, 12 June 2018, DOI: 10.3847/2041/aac882 

Journal reference: Nature 
Provided by: University of Groningen

Read more at:

The merger that led to the formation of the Milky Way’s inner stellar halo and thick disk

Naturevolume 563, pages85–88 (2018) Download Citation[/size]

The assembly of our Galaxy can be reconstructed using the motions and chemistry of individual stars1,2. Chemo-dynamical studies of the stellar halo near the Sun have indicated the presence of multiple components3, such as streams4 and clumps5, as well as correlations between the stars’ chemical abundances and orbital parameters6–8. Recently, analyses of two large stellar surveys9,10 revealed the presence of a well populated elemental abundance sequence7,11, two distinct sequences in the colour–magnitude diagram12 and a prominent, slightly retrograde kinematic structure13,14 in the halo near the Sun, which may trace an important accretion event experienced by the Galaxy15. However, the link between these observations and their implications for Galactic history is not well understood. Here we report an analysis of the kinematics, chemistry, age and spatial distribution of stars that are mainly linked to two major Galactic components: the thick disk and the stellar halo. We demonstrate that the inner halo is dominated by debris from an object that at infall was slightly more massive than the Small Magellanic Cloud, and which we refer to as Gaia–Enceladus. The stars that originate in Gaia–Enceladus cover nearly the full sky, and their motions reveal the presence of streams and slightly retrograde and elongated trajectories. With an estimated mass ratio of four to one, the merger of the Milky Way with Gaia–Enceladus must have led to the dynamical heating of the precursor of the Galactic thick disk, thus contributing to the formation of this component approximately ten billion years ago. These findings are in line with the results of galaxy formation simulations, which predict that the inner stellar halo should be dominated by debris from only a few massive progenitors2,16.

RE: `Oumuamua, the first known interstellar asteroid, - Vianova - 11-02-2018


ahhhhh ... music to my ears

Quote:Loeb further illustrated this idea in a recent article he penned for Scientific American, 
where he suggested that 'Oumuamua 
could be the first known case of an artificial relic which floated into our solar system from interstellar space

"This opportunity establishes a potential foundation for a new frontier of space archaeology, 
namely the study of relics from past civilizations in space,"
 Loeb wrote.

The Milennium Falcon perched on top of Ryugu would be a good score. 
Martian jade carvings encrusted in gold, 
found in ancient  Anunnaki tombs near the D &M, would be dandy artifacts.

It's the premise of retrieving the technology ... relic alien weaponry ... warp drive ... star gate ...
Science Fiction stories ... Hollywood ... has made all the movies ...
and of course,
the shriveled up alien corpse inside the spacesuit ... would be the big score.

The galaxy is probably littered with encrusted relics of spacecraft.

It is -- rare and fine -- ancient alien art objects made with precious materials -- that you want to find.
The heck with the space  Horsepoop  craft,
show me the jewelry  Hi 
that the Anunnaki Queen wore to the opera.