Question

Find the Legrangian point L1 between a planet and it's moon.

Answer 1

Moon \(9.76\times10^{20}kg\) orbits \(1.20\times10^{7}m\) around the planet \(5.29\times10^{22}kg\).
?

Answer 2

is that one the one where the gravitational force between the planet and the object is exactly equal to the gravitational force between the moon and the object ?

Answer 3

Yeah, that makes sense.

Answer 4

actually thats not right , the gravitational attractions do not cancel exactly at the L_1 point

Answer 5

it is more complicated than that, i think you have to use Kepler's third law,