The night sky is fascinating to watch with the naked eye. Billions of stars twinkle across our own galaxy and billions of other galaxies across the universe. But something else might catch your attention in the night sky: our own magnificent moon! But have you ever wondered why we always see the same side of the moon? In fact, the first time we ever took a picture of the far side of the moon was when the Apollo astronauts flew around the moon and back. From the surface of the Earth, it is simply impossible to see the other side of the Moon. Sounds like the far side of the moon is playing hide and seek. Actually, there is a reason for this strange phenomenon, and it is called tidal locking.
Photo used in this episode is from Tomruen on Wikipedia licensed under Creative Commons Attribution-Share Alike 4.0 International license.