Fifty years ago, Walt Cunningham became one of NASA's first Apollo astronauts to fly into space and, aboard the same mission, one of the first people to use a Space Pen.
from Space.com https://ift.tt/2ErL7Ek
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By BY RAYMOND ZHONG from NYT Technology https://ift.tt/2ZVzHzt
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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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NSF's 10 Big Ideas Since 2017, NSF has been building a foundation for the Big Ideas through pioneering research and pilot activities....
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