Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Gliese 876 is a red dwarf star approximately 15 light-years away from Earth in the constellation of Aquarius. As of 2011, it has been confirmed that four extrasolar planets orbit the star. Two of the middle planets are similar to Jupiter, while the closest planet is thought to be similar to a small Neptune or a large terrestrial planet, and the outer planet has mass similar to Uranus. The orbits of all but the closest planet are locked in a rare three-body Laplace resonance.