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.
By gauging the subtle differences in light given off by a planet 1,000 light-years away, it shows that it's up to the job.
The US will launch the Kepler spacecraft Friday to look for other Earths.
Geoff Marcy, astronomy’s Indiana Jones, had 10 days, one telescope, and a universe of planets to discover.