The Moon drifts away from Earth by about how much each year?

What BBN said about it

1. 

   Hank Ledger · Lead AnchorThe question: the Moon drifts away from Earth by about how much each year? A, three point eight millimeters. B, three point eight centimeters.

2. 

   Hank Ledger · Lead AnchorC, three point eight meters. D, thirty-eight kilometers.

3. 

   Chip Darnell · U.S. News AnchorOh, I love this one! I already feel a big number coming!

4. 

   Hank Ledger · Lead AnchorTen seconds, Chip. Show us what you've got.

5. 

   Chip Darnell · U.S. News AnchorWell, the Moon's been drifting for billions of years, so I'm gonna say it's gotten really good at it by now.

6. 

   Chip Darnell · U.S. News AnchorAnd the Moon has had billions of years of practice, so it must be way worse than me.

7. 

   Chip Darnell · U.S. News AnchorKilometers, Hank. Final answer, D!

8. 

   Hank Ledger · Lead AnchorThe answer is B, about three point eight centimeters a year.

9. 

   Hank Ledger · Lead AnchorScientists track it by bouncing lasers off the Moon and timing the echo, per Wikipedia.

10. 

    Chip Darnell · U.S. News AnchorCentimeters? So the Moon parks better than I do.

11. 

    Hank Ledger · Lead AnchorIn twenty-eight years, Chip, that is the first thing you have gotten right.