NASA, Kepler, exomoon
NASA’s Hubble and Kepler space telescopes have uncovered what could be the first moon outside our solar system ever found. More observations are needed to confirm this discovery. NASA/ESA/L. Hustak

NASA Telescopes May Have Spotted the First ‘Exomoon'

Astronomers using the Kepler and Hubble telescopes have glimpsed what seems to be a colossal moon roughly 8,000 light-years away.

Artist's impression of a hypothetical Earth-like moon around a Saturn-like exoplanet. | NASA