Rogue Planet

Galaxy may be filled with 'rogue' worlds

Excited scientists have found signs of a new class of planet: Massive gas giants that drift through space.

Failed stars? 

Also: 

• Shuttle tiles inspected
• Space station upgraded
• In orbit, Kelly keeps focus

More:

'Exciting' find: Possible planets without orbits

Are these planets without orbits? Astronomers have found 10 potential planets as massive as Jupiter wandering through a slice of the Milky Way galaxy, following either very wide orbits or no orbit at all.

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