The Moon, Its Size and Distance, It's Stable

The moon itself, by being so big compared to the Earth, it gyro-stabilizes the Earth's spin on its axis. The early test of general relativity had to do with the way stars were able to bite from the stars around and mass general relativity quite well. Open the door for cosmology, large scale structures. Also you look at just the beauty of a lot of cosmic stuff. This is God's own artwork. You go there, you got these incredible pictures, people love those that make posters of them who in the wall.