Eric Verlinde's new theory of gravity - an alternative to Einstein's theory - eliminates the need for dark matter. To test it, astronomers measured gravity around 33,000 galaxies.
Best way to find the Geminid radiant is to see a meteor! Then trace its path backwards. But what if you want to find the radiant before seeing a meteor?
This dark cloud is located inside a larger star-forming region … a place where new stars are being born. Astrophotographer Trevor Jones has tips on how you can capture this nebula.
Moon hit Bull's Eye last night See the little dot of light at 8 o'clock, just beyond the limb of the moon? It's a bright star Aldebaran, Eye of the Bull in Taurus. The moon covered - or occulted - this star last night. Eliot Herman in Tucson, Arizona caught the pair before the moon hid Aldebaran from view. Thanks Eliot!
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