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Milky Way may have a huge hidden neighbour....
http://www.newscientist.com/article/mg2 ... hbour.html ^
| August 13th, 2009
Posted on 08/21/2009 12:46:43 PM PDT by TaraP
A LARGE satellite galaxy may be lurking, hidden from view, next door to our own. Sukanya Chakrabarti and Leo Blitz of the University of California, Berkeley, suspected that the gravity of a nearby galaxy was causing perturbations that have been observed in gas on the fringes of the Milky Way. "We did a large range of simulations where we varied the mass of the perturber and the distance of closest approach," says Chakrabarti. In the best-fitting simulation, the unseen galaxy has about 1 per cent of the Milky Way's mass, or 10 billion times the mass of the sun. That's a lot. It means the object has roughly the same mass as the Milky Way's brightest satellite galaxy, the Large Magellanic Cloud (LMC). Right now, says Chakrabarti, the galaxy is roughly 300,000 light years away from us - about twice as far away as the LMC. But the simulations suggest it follows a highly elongated elliptical path, and about 300 million years ago it swept through our own galaxy just 16,000 light years from the galactic centre - closer in than Earth - disturbing the Milky Way's outskirts as it went.
(Excerpt) Read more at newscientist.com ...
TOPICS: Culture/Society; News/Current Events; Philosophy
KEYWORDS: astronomy; catastrophism; galaxy; milkyway; science; sourcetitlenoturl; space; xplanets
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1
posted on
08/21/2009 12:46:43 PM PDT
by
TaraP
To: Star Traveler; Quix
To make matters worse, the simulations suggest that the galaxy orbits ours in the same plane as our galaxy’s disc. If it is now on the opposite side of the galaxy from us, it could be hiding behind the thick gas and dust in the galactic plane. “It’s very likely to be in a region of very high obscuration,” says Chakrabarti. The work will appear in Monthly Notices of the Royal Astronomical Society.
By further studying the distribution of gas, Chakrabarti hopes to pinpoint the galaxy’s location so that astronomers will know where to look for it. This parallels the way astronomers in the 1840s discovered Neptune from irregularities in the motion of Uranus caused by gravitational tugs from the more distant planet.
If the unseen galaxy exists, it will be the first nearby galaxy detected through its gravity rather than its starlight.
2
posted on
08/21/2009 12:48:03 PM PDT
by
TaraP
(*Religion* is Man trying to reach GOD.Christ is GOD reaching out to Man.)
To: TaraP
3
posted on
08/21/2009 12:48:55 PM PDT
by
Zionist Conspirator
(Som tasim `aleykha melekh, 'asher bachar HaShem 'Eloqeykha bo . . .)
To: Zionist Conspirator
4
posted on
08/21/2009 12:50:59 PM PDT
by
freedumb2003
(Communism comes to America: 1/20/2009. Keep your powder dry, folks. Sic semper tyrannis)
To: dighton
Milky Way may have a huge hidden neighbour.... It wouldn't be the Mars bar, would it?
To: freedumb2003
Mars bar?Can you even buy Mars bars anymore? I don't see them in the stores in central VA.
6
posted on
08/21/2009 12:53:00 PM PDT
by
paulycy
(Screw the RACErs.)
To: TaraP
I knew it. I could feel the pull of the other galaxy when I flew across the country
(obscure reference to Michigan Senator Debbie Stabenow)
7
posted on
08/21/2009 12:53:08 PM PDT
by
kidd
(Obama: The triumph of hope over evidence)
To: TaraP
It's impossible to hide a galaxy.
Unless maybe you are hiding it behind the shed out back.
Then, yeah, sure.
8
posted on
08/21/2009 12:53:48 PM PDT
by
Lazamataz
("If they taxed condoms and toilet paper, they'd have us coming and going." - Lazamataz, 2002)
To: paulycy
They can be bought here in the US, but are much more common in the UK.
9
posted on
08/21/2009 12:54:05 PM PDT
by
mware
(F-R-E-E, that spells free. Free Republic.com baby.)
To: TaraP
Hmmmmmm
Hide and seek on a truly galactic scale!
Right here in this END TIMES era . . . when
SIGNS IN THE HEAVENS is in the script!
10
posted on
08/21/2009 12:54:15 PM PDT
by
Quix
(POL Ldrs quotes fm1900 2 presnt: http://www.freerepublic.com/focus/religion/2130557/posts?page=81#81)
To: TaraP
In the best-fitting simulation, the unseen galaxy has about 1 per cent of the Milky Way's mass, Very misleading title then.
11
posted on
08/21/2009 12:55:28 PM PDT
by
Moonman62
(The issue of whether cheap labor makes America great should have been settled by the Civil War.)
To: TaraP
Milky Way may have a huge hidden neighbor....
Worse yet scientists reported that this neighboring galaxy played loud music late at night, didn't cut its grass, left its garbage cans out at the curb for several days and left beer cans in the Milkyways front yard. The intergalactic tenants association has been called, but had no comment.
12
posted on
08/21/2009 12:56:28 PM PDT
by
GonzoGOP
(There are millions of paranoid people in the world, and they are all out to get me.)
To: TaraP
Well, my wish for all FReepers is that the next time this thing comes plowing through the Milky Way galaxy, disturbing everything to which it comes near, that it doesn’t come anywhere near Uranus.
To: TaraP
There was a theory floating around I read about recently that the Earth is actually part of a small galaxy or cluster of stars that collided with the Milky Way Galaxy.
And of course, we all know about the Dec 21 2012 theory of our demise based on a perfect alignment of our solar system with the center of the galaxy or some such.
14
posted on
08/21/2009 12:57:20 PM PDT
by
saganite
(What would Sully do?)
To: TaraP
... causing perturbations ... in gas ...
Ah, yes! Now I understand.
15
posted on
08/21/2009 12:57:21 PM PDT
by
RobinOfKingston
(Democrats, the party of evil. Republicans, the party of stupid.)
To: paulycy
The old U.S. Mars bar, the one with white nougat and almonds, has been re-packaged as Snickers with Almonds, same candy bar.
It's not the same Mars bar sold in the U.K., I understand.
To: TaraP
Based on our little exchange — Do you think????? “Could be. Who knows? There's something comin’. I don’ know what it is, but it is gonna’ be great. The air is hummin’ and somethin’ great is comin’.” I always loved that song. I always felt cheated that “Tony” got the best song in the musical “Westside Story”. ;-)
To: Lazamataz
It's impossible to hide a galaxy. No, no, no--just put it in a marble tied around your cat's neck.
18
posted on
08/21/2009 1:00:06 PM PDT
by
ShadowAce
(Linux -- The Ultimate Windows Service Pack)
To: paulycy
Can you even buy Mars bars anymore? Now I have to start looking :)
19
posted on
08/21/2009 1:01:05 PM PDT
by
freedumb2003
(Communism comes to America: 1/20/2009. Keep your powder dry, folks. Sic semper tyrannis)
To: RobinOfKingston; Lazamataz
... causing perturbations ... in gas ...Ah, yes! Now I understand. Must be Laz.
20
posted on
08/21/2009 1:01:16 PM PDT
by
ShadowAce
(Linux -- The Ultimate Windows Service Pack)
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