Astronomers using the NASA/ESA Hubble Space Telescope and NASA’s Kepler Space Telescope have assembled compelling evidence for the existence of a large exomoon orbiting Kepler 1625b, a gas giant located approximately 8,000 light-years away from Earth. An artist’s impression of the gas giant Kepler 1625b with its large moon, Kepler 1625b-i; the pair has a similar mass and radius ratio to the Earth-Moon system but scaled up by a factor of 11. Image...
