Total solar eclipses happen because the Sun is about 400 times wider than the Moon and about 400 times farther away.

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Total solar eclipses happen because the Sun is about 400 times wider than the Moon and about 400 times farther away.

Yes. The Sun's diameter is roughly 400 times the Moon's, and it is roughly 400 times farther from Earth. The two effects nearly cancel, so both appear about half a degree wide, letting the Moon cover the Sun exactly.