This artist concept illustrates a hot, Neptune-sized planet called GJ 436b. NASA Spitzer Space Telescope has found evidence that GJ 436b, orbiting a star beyond our sun lacks methane -- an ingredient common to many planets in our own solar system.
This artist concept illustrates a hot, Neptune-sized planet called GJ 436b. NASA Spitzer Space Telescope has found evidence that GJ 436b, orbiting a star beyond our sun lacks methane -- an ingredient common to many planets in our own solar system.