There's one good thing about the current cold wave — clear nights. I can understand how piling on clothes and walking into the stinging, subzero darkness might be the last thing on your mind. But I'm ...
What can you see on the Moon's surface tonight?
How do you tell how old an astronomical object is? I mean, the next time the moon is in the sky, take a look at it. How would you even begin to answer that question? I won't leave you in suspense.
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