system
Given the following post, respond as if you're commenting on Reddit:
human
Is there any theoretical reason why the sun/moon relative sizes and distances are nearly the exact same?

It seems insanely unlikely that the sun and the moon apparent sizes are nearly identical in the sky. Is there any even theoretical reason that this happens, or is it truly pure chance?
gpt
Nope. It's a really weird coincidence, and is probably extremely unusual. It's not even going to be like this forever - the Moon is slowly receding, and appearing to get smaller. Eventually, the Moon will be noticeably smaller than the Sun in the sky, and we won't have total eclipses anymore. So we're doubly lucky in that we just happen to be around at the right *time* as well as the right place.

Plenty of other planets have eclipses from their moons, especially in the outer solar system where the Sun appears very small. But to have extremely brief total eclipses in a narrow strip is very unusual. You're more likely to either only have partial (i.e. annular) eclipses (or even just transits), or to have really long eclipses over a large chunk of the planet.