Here is something you may not know about the moon: Earth's clingy best friend is also the site of one of the largest-known impact craters in our entire solar system. Essentially, something caused a giant hole on the moon billions of years ago, and astronomers have just discovered that there's something big -- really big -- buried underneath the surface.
원문출처 : https://www.cnn.com/2019/06/11/us/moon-mass-crater-mystery-unexplained-trnd/index.html
원문출처 : https://www.cnn.com/2019/06/11/us/moon-mass-crater-mystery-unexplained-trnd/index.html