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Author Topic: Rogue Planet 'Nomads' May Outnumber Stars In Milky Way  (Read 2854 times)

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Rogue Planet 'Nomads' May Outnumber Stars In Milky Way
« on: February 27, 2012, 12:39:33 PM »
SPACE.com, 02/24/2012
Rogue Planet 'Nomads' May Outnumber Stars In Milky Way
http://www.huffingtonpost.com/2012/02/25/rogue-planet-nomads-may-outnumber-stars_n_1301721.html

Our Milky Way galaxy may be teeming with rogue planets that ramble through space instead of being locked in orbit around a star, a new study suggests.

These "nomad planets" could be surprisingly common in our bustling galaxy, according to researchers at the Kavli Institute for Particle Astrophysics and Cosmology (KIPAC), a joint institute of Stanford University and the SLAC National Accelerator Laboratory. The study predicts that there may be 100,000 times more of these wandering, homeless planets than stars in the Milky Way.

If this is the case, these intriguing cosmic bodies would belong to a whole new class of alien worlds, shaking up existing theories of planet formation. These free-flying planets may also raise new and tantalizing questions in the search for life beyond Earth.

"If any of these nomad planets are big enough to have a thick atmosphere, they could have trapped enough heat for bacterial life to exist," study leader Louis Strigari said in a statement.

And while nomad planets cannot benefit from the heat given off from their parent stars, these worlds could generate heat from tectonic activity or internal radioactive decay, the researchers said.

 

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