# How many LaGrange points does the Earth/Moon system have?

A)How many LaGrange points does the Earth/Moon system have?

B) How many are stable (no stationkeeping neccessary)?

C) Roughly where are the stable points located?

1/2 point point for each answered correctly

a)5
b)3
c)Half-distance moon- earth

Originally posted by Greg Bernhardt
A)How many LaGrange points does the Earth/Moon system have?
5
B) How many are stable (no stationkeeping neccessary)?
2
C) Roughly where are the stable points located?

CrystalStudios
You both are wrong!

5 points

2 are stable

3 are meta-stable

If you form a straight line with the meta-stable points, the one stable point is 60 degress to the right of the L1 and L2 and the other stable points is 60 degrees to the left of the L1 and L2 points.

J-Man - your error lies in the fact that you did not say what it was 60 degrees ahead and behind of....

L1 and L2 follow the moon - and so the points are 60 degress right and left of the L1 and L2 points (and of course the moon too).

Last edited by a moderator:
No J-man is right. Sadly I did not beat him to post it.

It looks like he said where they are to me. And we are both right in the scope of the question. Now that you edited your post, and tossed in a bit more info, you have it correct.

A. 6x10^34

B. 1

C. Right near the beach