Orbital Decay

The Moon’s orbit is decaying. This isn’t anything I’m responsible for, it’s been going on for as long as there’s been a Moon.
It’s worth explaining what that means. When you say that an orbit is decaying, folks generally think that means the object in orbit is going to fall on them. That is what happened to SkyLab, but not to worry. The Moon isn’t going to fall out of the sky. Quite the opposite really.
The orbit of Earth’s Moon is slowly expanding. Every year the Moon’s orbit takes it an average of 1 1/2 inches further away from the Earth. That doesn’t seem like much difference, but over time what that means is eventually The Moon will drift off into space (though not nearly as dramatically as in Space:1999).
Turning it around is also interesting. Looking backwards through time, every year further back, The Moon was another inch and a half closer. Ten years ago it was nearly a foot and a half closer. Looking back 65 million years ago, The Moon orbited at a distance of less than 10 feet.
That’s why the dinosaurs are extinct. They got clobbered.