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Astrophysics picture of the day for September 16, 2019
Picture of the Day
What are those colorful rings around the Moon? A corona. Rings like this will sometimes appear when the Moon is seen through thin clouds. The...
Potsdam Gravity Potato
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How Satellites and Telescopes are Tracking the Effects of Global Change, Down to the Millimeter

In the Davis Mountains of far west Texas, at the University of Texas McDonald Observatory, astronomers spend their nights peering at the stars thro

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