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How Many Unbound Planets in Milky Way?
Sky and Telescopeha ^ | 2/29/2012 | Monica Young

Posted on 03/23/2012 8:43:25 PM PDT by U-238

Life as we know it exists on a cozy planet in a stable orbit around a sun shining brightly in its sky. But a new study hints that the most common life in the universe might exist deep inside eternal-night worlds far from any star, adrift in the icy dark of interstellar space.

Researchers at the Kavli Institute for Particle Astrophysics and Cosmology (KIPAC) at Stanford University estimate that "nomad" planets, ejected from their home stellar system and now free-floating through the Milky Way, could outnumber stars by as many as 100,000 to 1. Earlier estimates were more like a handful to 1, though previous studies have only counted unbound planets more massive than Jupiter.

To estimate the number of unbound planets as small as Pluto that could be roaming the galaxy, Louis Strigari (KIPAC), lead author of the study, began with a basic rule of nature: where a few big objects are found, there are many more small, just like a few boulders may be surrounded by thousands of pebbles. Strigari and colleagues calculated the number of unbound planets by extrapolating from the small number detected so far by direct imaging and by gravitational microlensing.

(Excerpt) Read more at skyandtelescope.com ...


TOPICS: Astronomy; Science
KEYWORDS: astronomy; astrophysics; catastrophism; cosmology; galaxy; interstellarspace; milkywaygalaxy; planets; rogueplanet; rogueplanets; science; solarsystem; xplanets

1 posted on 03/23/2012 8:43:33 PM PDT by U-238
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To: U-238

interesting


2 posted on 03/23/2012 8:47:09 PM PDT by svcw (CLEAN WATER & Education http://www.longlostsis.com/PI/MayanHelp2012.html)
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To: SunkenCiv; KevinDavis

Ping


3 posted on 03/23/2012 8:47:09 PM PDT by U-238
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To: U-238
U keeping it simple, how do these planets escape gravity's influence.
sorry watching FRINGE only skimmed article, Ok I didn't understand the more tech stuff.

4 posted on 03/23/2012 8:53:06 PM PDT by svcw (CLEAN WATER & Education http://www.longlostsis.com/PI/MayanHelp2012.html)
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To: svcw

Some of these planets are ejected by their parent star when they are forming star systems.


5 posted on 03/23/2012 8:59:00 PM PDT by U-238
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To: U-238

Well of all the crazy places to look for worlds !

Maybe they should put away the telescopes and look for new worlds with super microscopes

Little tiny worlds would sure be cheaper / easier to reach


6 posted on 03/23/2012 9:00:19 PM PDT by jcon40
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To: U-238
Kind of too far to get to another star. But, maybe one of these babes is near by?

Then we could create a colony there. But, only if Newt is elected.


7 posted on 03/23/2012 9:03:33 PM PDT by garjog
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To: U-238

Scientists tell of ‘runaway’ planets
UPI | March 22, 2012 | UPI
Posted on 03/22/2012 11:14:22 PM PDT by U-238
http://www.freerepublic.com/focus/chat/2862701/posts


8 posted on 03/23/2012 9:10:21 PM PDT by SunkenCiv (I come to bury Caesar, not to praise him)
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To: SunkenCiv

I believe hat story is about planets ejected from the Milky Way. These are planets that are within the interstellar medium wandering in the Milky Way


9 posted on 03/23/2012 9:13:10 PM PDT by U-238
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To: U-238

Thank for posting this! Great article!


10 posted on 03/23/2012 9:14:03 PM PDT by NMCicero
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I'm not going to ping this.



 
X-Planets
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11 posted on 03/23/2012 9:14:32 PM PDT by SunkenCiv (I come to bury Caesar, not to praise him)
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To: NMCicero

You are welcome.


12 posted on 03/23/2012 9:14:57 PM PDT by U-238
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To: U-238

And just what sort of life might thrive in icy cold darkness in an inter stellar void? Nothing I’d want to snuggle-up to, that’s for sure!


13 posted on 03/23/2012 9:26:19 PM PDT by Tucker39 ( Psa 68:19Blessed be the Lord, who daily loadeth us with benefits; even the God of our salvation.KJV)
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To: U-238

Thanks, and from the FRchives:
14 posted on 03/23/2012 9:28:08 PM PDT by SunkenCiv (I come to bury Caesar, not to praise him)
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To: U-238
Actually one of my favorite end of the world scenarios is a rogue giant planet getting pulled into our solar system and changing the earth's orbit. The other thing that interested me is that with various large objects between the systems, a Star Trek like warp speed flight would sound more like a big splat after a few minutes.
15 posted on 03/23/2012 9:30:02 PM PDT by dog breath
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To: U-238

THNX


16 posted on 03/23/2012 9:31:19 PM PDT by svcw (CLEAN WATER & Education http://www.longlostsis.com/PI/MayanHelp2012.html)
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To: dog breath

>> “Actually one of my favorite end of the world scenarios is a rogue giant planet getting pulled into our solar system and changing the earth’s orbit” <<

.
Actually its for real, but its a star, not a planet, and its name is Wormwood. Read Revelation. Its due in a few years.


17 posted on 03/23/2012 9:48:12 PM PDT by editor-surveyor (No Federal Sales Tax - No Way!)
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To: Tucker39

If the rogue planet has a warm and active interior, you might have a planet like the moon Europa. There is an ice crust then on the inside of the planet an ocean.


18 posted on 03/23/2012 9:54:58 PM PDT by U-238
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To: U-238

Europa’s interior is a result of tidal compression/decompression from Jupiter’s influence. It would otherwise be as dead as the Moon with extra water-ice.


19 posted on 03/24/2012 1:19:53 AM PDT by Crazieman (Feb 7, 2008 http://www.freerepublic.com/focus/f-news/1966675/posts?page=28#28)
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To: Crazieman
You are absolutely correct. But its interesting to note, that Jupiter's Galilean system of moons looks like a mini-Solar System.
20 posted on 03/24/2012 1:28:55 AM PDT by U-238
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To: U-238

Inability to commit is destroying the galaxy!!!


21 posted on 03/24/2012 6:17:24 AM PDT by Caipirabob (I say we take off and Newt the site from orbit. It's the only way to be sure...)
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To: U-238

I remember reading “When Worlds Collide” and “After Worlds Collide” as a kid. The destruction of earth and jumping to the rogue planet was fascinating but required a serious suspension of belief.
Now we know that rogue planets DO exist!


22 posted on 03/24/2012 7:56:48 AM PDT by tbw2
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