The Sky Tonight for The Week of July 18, 2021

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With this edition of the sky tonight, the sky has changed slightly since last week. Today we look at the sky for the week beginning Sunday, July 18th.

Sunday, July 18th, we have brilliant Venus and ruddy red Mars still well placed in the Southwest sky and setting at 9:50 PM, EDT, following the sun as it sets at 8:26 PM, EDT. As the two planets set, red supergiant Antares, the heart of the Scorpion, has passed the meridian with Sagittarius becoming well placed……..

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The rapidly expanding hydrogen shell and shock front following a Type-II Core Collapse supernova. Image credit: NASA Goddard SFC


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