Sun

Helium was discovered on the Sun before on Earth. During an 1868 eclipse, astronomers found an unknown yellow line in the solar Spectrum; Norman Lockyer named the new element after Helios. It was not isolated on Earth until 1895.

The Moon's orbit doesn't spiral around Earth as most people imagine. Because the Earth-Moon distance is tiny compared to the Earth-Sun distance, the Moon's actual path through space is nearly circular, traveling alongside Earth around the Sun.

Earth has 365 days in a year, but actually rotates 366 times. The extra rotation comes from its orbit around the Sun — an example of the coin rotation paradox.