Posted on Sunday, 15 May, 2011 | 21 comments| News tip by: Persia
Image credit: NASA
Planets that exist on their own away from stars or orbits could potentially host alien life.
Interstellar planets are believed to originally form around stars but are later cast out due to gravitational tugs of war. A thick atmosphere or tidal heating from an orbiting moon could help to keep these solitary bodies warm in the darkness of space.
"They are often thought to be nearly invisible, since they are much dimmer than stars and do not have any suns nearby to illuminate them."