Step outside as darkness falls this week, look directly overhead and you will see a landmark of the summertime sky, the Summer Triangle, composed of the bright stars Vega, Altair and Deneb. It's almost as if time stands still.
from Space.com https://ift.tt/2P2Gbqe
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By BY RAYMOND ZHONG from NYT Technology https://ift.tt/2ZVzHzt
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By BY NATHANIEL POPPER from NYT Technology https://ift.tt/31OxrNi
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The blood-red color of the moon during a total lunar eclipse may be difficult to explain without a basic understanding of orbital mechanics,...
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