Suspected exomoon spotted
Kepler and Hubble have detected evidence of the first known moon outside our Solar System
NASA’S Kepler and Hubble space telescopes may have found a moon orbiting the exoplanet Kepler-1625b, around 8,000 lightyears away in the constellation of Cygnus. Its presence has been detected in a similar way to how exoplanets are found via the transit method, where astronomers measure how much a star’s light appears to dim when an object passes in front of it. While further data is needed to confirm its existence, the initial findings suggest it's about the size of Neptune and may have formed through a completely different process to any of the moons we know of.
The Neptune-sized exomoon is thought to orbit a giant Jupiter-like planet in the Kepler-1625 system