lp94420_300.jpg
The first flare ever seen from a brown dwarf, or failed star, has been detected by the Chandra X-ray Observatory. For the first nine hours and 36 minutes of Chandra's observation, no X-rays were detected from Brown Dwarf LP 944-20 (left panel). Then the brown dwarf turned on with a bright X-ray flare (right) that gradually diminished over the last few hours of the observation. The grainy appearance of the image on the right is due to a shorter exposure time. The bright dots in the background are other X-ray sources, seven of which have been identified as stars.
Credit: NASA
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