![Columbia Astronomers Find First Compelling Evidence for a Moon Outside Our Solar System](https://science.fas.columbia.edu/wp-content/uploads/2018/10/K1625_Durda2_planet_moon_illustration_exomoon.jpg)
Columbia Astronomers Find First Compelling Evidence for a Moon Outside Our Solar System
A pair of Columbia astronomers using NASA’s Hubble Space Telescope and Kepler Space Telescope have assembled evidence for the existence of a moon orbiting a gas-giant planet 8,000 light-years away.