Astronomers May Have Found the First Moon Outside of Our Solar System

A team of astronomers has potentially discovered the first known moon beyond the Solar System. If confirmed, the “exomoon” is likely to be about the size and mass of Neptune, and circles a planet the size of Jupiter but with 10 times the mass. The signal was detected by Nasa’s Kepler Space Telescope; astronomers now plan to carry out follow-up … Continue reading →