Long ago an intelligent race landed their ships on a wild planet and called it Earth. They used a system to measure things that they could be adjusted to fit to any planet.
First they divided the time that it took for the Earth to rotate once into 24 parts and called these "hours". They divided each hour into 60 "minutes", and these into 60 "seconds" making 12 hours into 43200 seconds and 24 hours 86400 seconds. Now they could measure time.
Then they divided the radius of the Sun into 432000 equal parts and called one of these a "mile", then they could measure the land.
After that they decided to make a Moon to bring motion to the Earths water. To make it they divided 432000 by 200 giving them a measure of 2160 miles for the Moons radius. This made the Moon exactly 400 times smaller than the sun. Then they placed the Moon 400 times closer to the Earth than the Sun, so that both the Sun and the Moon would be the same size in the sky and could eclipse each other.
First they divided the time that it took for the Earth to rotate once into 24 parts and called these "hours". They divided each hour into 60 "minutes", and these into 60 "seconds" making 12 hours into 43200 seconds and 24 hours 86400 seconds. Now they could measure time.
Then they divided the radius of the Sun into 432000 equal parts and called one of these a "mile", then they could measure the land.
After that they decided to make a Moon to bring motion to the Earths water. To make it they divided 432000 by 200 giving them a measure of 2160 miles for the Moons radius. This made the Moon exactly 400 times smaller than the sun. Then they placed the Moon 400 times closer to the Earth than the Sun, so that both the Sun and the Moon would be the same size in the sky and could eclipse each other.