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 E-Mail IMAGE: This is an artist s impression of the Earth-sized, rocky exoplanet GJ 1132 b, located 41 light-years away around a red dwarf star. Scientists using NASA s Hubble Space Telescope have found. view more  Credit: Credits: NASA, ESA, and R. Hurt (IPAC/Caltech) Scientists using NASA s Hubble Space Telescope have found evidence that a planet orbiting a distant star may have lost its atmosphere but gained a second one through volcanic activity. The planet, GJ 1132 b, is hypothesized to have begun as a gaseous world with a thick hydrogen blanket of atmosphere. Starting out at several times the diameter of Earth, this so-called sub-Neptune is believed to have quickly lost its primordial hydrogen and helium atmosphere due to the intense radiation of the hot, young star it orbits. In a short period of time, such a planet would be stripped down to a bare core about the size of Earth. That s when things got interesting.

United statesGoddard space flight centerMark swainAnn jenkins ray villardRaissa estrelaClaire andreoliPropulsion laboratorySpace telescope science instituteM swain jet propulsion laboratorySpace telescopeJames webb space telescopeJet propulsion laboratorySpace flight centerRay villardTelescope science instituteSpace planetary science