| Artist's conception of a "super-Earth" and hypothetical moon, orbiting a red dwarf star 9,000 light-years away. The 13-Earth-mass planet was detected by a search for microlensing events, in which the gravity of a foreground star distorts the light of a more distant background star. Credit: David A. Aguilar (Harvard-Smithsonian Center for Astrophysics) |
