The moon needs to be at least a half sphere to make the phases work in any way and actually be 59% toward being a sphere to make the "Lunar Libration" work. Here is a nice picture of "Lunar Libration" on crater Tyco ( ). EVERY picture of the moon would be the same, give or take the phases (which you couldn't have per (1)) and shadows on craters. If it were flat, you could only see what the disk shows you - exactly - nothing more. most importantly, people have taken pictures of this - FROM EARTH obviously, not space. If the moon is a sphere, and one side of the moon always faces the earth, we can actually see slightly more than half of the moon from earth (about 59% under the right conditions but only 50% at a time, the rest is from "Lunar Libration") and.Like the video says, you can not get the phases much less curved phases on a disk.The moon is a totally different story though. This has therefore a high probability of applying to the Earth, but does not prove that the Earth rotates - just implies it. Another point in the video is that the planets and the sun amateur astronomers can see with a backyard telescope (I had one for many years) all rotate and their moons revolve around them - which is true.
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