February is packed with interesting observances, but one that stands out is Leap Day—and the Leap Year that makes it possible! If you’re wondering “When is the next leap year?” or curious about why we ...
Earth's Moon: NASA's Galileo spacecraft took this image of Earth's Moon on Dec. 7, 1992, on its way to explore the Jupiter system in 1995-97. The Moon is Earth's only natural satellite.
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