Forget about Luke Skywalker's fictional "Star Wars" home planet Tatooine and its two suns. Astronomers say they may have found the first known planet that's caught up in the orbits of three different ...

A “planet parade” has been gracing the sky for much of August this year, but after Friday, Aug. 29, it’s set to be diminished. Venus, Jupiter and Saturn will be the easiest to spot, with Mercury ...