system
Given the following post, respond as if you're commenting on Reddit:
human
During a full eclipse, the moon and sun have the same apparent size in the sky (roughly). Is this just a coincidence, or did some natural combination of factors cause the distance and size of the moon to work out that way?
gpt
It's a coincidence. Both the sun and the moon vary by a few percent in apparent size, and they have a range that overlaps. Over very, very long times the sun will become bigger and the moon farther away, so eventually this will no longer be the case.