Fittingly hosted on the 21st night of September, the music-filled evening will include special guests Stevie Wonder, the Jonas Brothers, Jon Batiste and Janelle Monáe.
Telescopes on the National Mall tonight will give people a chance to see the stars and experience the largest astronomy outreach event in the United States.
TRAPPIST-1e shows no signs of its first atmosphere, but hints of a secondary one remain. Liquid water could still be possible ...
Watch the Sept. 21 partial solar eclipse live online with this handy livestream. Coverage begins at 2 p.m. EDT (1800 GMT).
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