NASA's Spitzer Space Telescope has found evidence that a hot, Neptune-sized planet orbiting a star beyond our sun lacks methane -- an ingredient common to many planets in our own solar system.
The planet illustrated here, called GJ 436b is about 980 degrees Fahrenheit (527 degrees Celsius) – it was expected to have methane but Spitzer's observations showed it does not.
(Image: © NASA/JPL-Caltech)
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