A Spatial Collection of Strange Worlds

I like the article I found at Space.com describing all of the different kinds of planets being discovered out in the Universe, such as Hot Jupiters, Pulsar Planets, Super-Earths, Water Worlds( yes like the movie!), and Free-Floating Planets, among others.

Normally planets are thought of as orbiting stars, but there are hints a number of bodies with the mass of gas giants might be free-floating. These might either have escaped from their suns or never had a star to begin with, born in star-forming regions without the mass needed to ignite.

Roughly a half-dozen candidate free-floating planets have been found so far, either still glowing from the heat released as their gravity contracts their mass, or from the rare times one passes in front of a star and magnifies the light from the background star. "It's not clear whether you call them planets because they formed as part of a planetary system and were subsequently ejected or formed as super-small brown dwarf stars with the mass of planets," Beichman said.

The Free-Floating Planets remind me of an episode of Star Trek:Enterprise entitled "Rogue Planet" in which the crew finds a planet out on its own, away from other planets and their sun and have an interesting encounter with an alien race hunting another sentient alien race.
The study of different kinds of planets is fascinating. Here is a clip from the Enterprise episode.