Tatooine is the mythical home of Luke Skywalker. Now, scientists have identified a planet in a binary system 200 light-years away, although the planet is more like Saturn in mass and makeup.
Brown dwarf: Over a period of several hours, the star exhibited the largest brightness variations ever seen on a cool brown dwarf.
Gliese 581g, a newly discovered, first-of-its-kind planet thought to exist in its star's habitable zone, might just be 'noise,' astronomers say.
The breakthrough images include a three-planet system around a sun-like star.