Andromeda sounds far away because 2.5 million light-years sounds far away. It lands with authority. It feels exact. It gives you the comfort of a labeled universe, one where galaxies, stars and ...
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NASA says every planet in the solar system could fit between Earth and Moon; here's the math behind it
On a clear night, it dominates the sky, bright enough to cast shadows and large enough for dark patches and surface features to be seen without any equipment. It appears close, almost familiar. For ...
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