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Watch 25 years of a supernova expanding into space squeezed into this 40-second NASA video
Prague, October 1604. The then 34-year-old astronomer Johannes Kepler was looking at the constellation of Ophiuchus, and he ...
This month marks the 18th year of the Sky Guy column. I have covered a lot of sky over the years, and I hope you have learned a little about our universe and gained an appreciation of the sky. This is ...
2 Russians, 2 Jews, and a Puerto Rican walk into a bar ...
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