If you want to prove that the moon is a disk, here is how you do it. Have one person north of the equator, say in Canada, and one person south of the equator, say in Argentina, take a picture of the moon at the same time. Then compare the two images, rotate it, adjust the size, and see if it shows the same surface area of the moon. If the moon is a disk, then you will see the same surface area. If it on the other hand is a ball, one side should be able to view a surface areas that the other side is not able to view.
To demonstrate this principal, you could set up stripped ball, and have two people stand 100 meters away from it, and 3 meters apart from each other, then have them use superzoom camera to take a picture of the stripped ball. They will not take a picture of the same surface area of the stripped ball. If you on the other hand do this with a disk, they will take a picture of the same surface area of the disk.
I believe the earth is round but the moon and sun are flat. /s
If you want to prove that the moon is a disk, here is how you do it. Have one person north of the equator, say in Canada, and one person south of the equator, say in Argentina, take a picture of the moon at the same time. Then compare the two images, rotate it, adjust the size, and see if it shows the same surface area of the moon. If the moon is a disk, then you will see the same surface area. If it on the other hand is a ball, one side should be able to view a surface areas that the other side is not able to view.
To demonstrate this principal, you could set up stripped ball, and have two people stand 100 meters away from it, and 3 meters apart from each other, then have them use superzoom camera to take a picture of the stripped ball. They will not take a picture of the same surface area of the stripped ball. If you on the other hand do this with a disk, they will take a picture of the same surface area of the disk.
I already know the moon is a sphere because I saw it through a telescope.