Astronomers using NASA?s Hubble Space Telescope have discovered an immense cloud of hydrogen evaporating from a Neptune-sized planet named GJ 436b. The planet?s atmosphere is evaporating because of extreme irradiation from its parent star.
SCIENCECAST VIDEO: http://youtu.be/TbWX7-ZoJAk
FULL STORY: http://science.nasa.gov/science-news/science-at-nasa/2015/31oct_worlds/
