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Why does the moon look gigantic rising on the horizon but not nearly so large overhead?

Why does the moon look gigantic rising on the horizon but not nearly so large overhead? asks Jerry Hostetler, of Phoenix, AZ.

Have you ever been riding in a car in the evening and noticed something huge and yellow behind the trees and buildings in the east–and then realized it was the Moon? Especially in [...]

How come it is still light for an hour after the sun sets?

How come it is still light for an hour after the sun sets? asks P. Ramana Mohan, of India.Twilight time: a time of purple clouds, deepening shadows, a fading glow in the sky. Still light enough to play outside, but getting harder and harder to read without a lamp. As a song made popular by [...]