7/31/2017 0 Comments Signal may be from first 'exomoon'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 observations with Hubble in October. A paper about the candidate moon is published on the Arxiv pre-print site. To date, astronomers have discovered more than 3,000 exoplanets - worlds orbiting stars other than the Sun. A hunt for exomoons - objects in orbit around those distant planets - has proceeded in parallel. But so far, these extrasolar satellites have lingered at the limits of detection with current techniques.
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