Either an image of light in the dark, or one that triggers a werewolf induced fear, the Moon has been in our skies for around 4.5 billion years. It is the Earth’s only permanent natural satellite and is thought to have formed from a giant impact between left over debris from Earth and a Mars sized body called Theia. The moon causes the Earth to have much larger tides and 24-hour days, without they Moon they would only be 6-8 hours.
This week, we speak to theoretical physicist Michio Kaku about the future of humanity, how we’re going to terraform Mars, why the modern space race will change life on Earth, and why aliens probably won’t bother to destroy us.
Oooh la la, tidal locking is caused by two bodies in synchronous rotation.