Hubble telescope finds planet evaporating at record speed
Astronomers using NASA's Hubble Space Telescope have discovered a Neptune-sized exoplanet evaporating 100 times faster than planets of similar size. GJ 3470b circles a red dwarf star, whose intense radiation heats hydrogen in the planet's upper atmosphere, causing it to escape into space. "In only a few billion years, half of the planet may be gone," a scientist said.