M(Earth) = 5.971024 kg (Mass of Earth)

M(Moon) = 7.351022 kg (mass of Moon)

R(EM) = 3.85108 m (average separation of Earth and Moon centers)

R(Earth) = 6.378106 m (radius of Earth)

R(Moon) = 1.738106 m (radius of Moon)

2. How do you find the gravitational field of two masses for any position around them that is outside the masses?

Again, for Earth and Moon consider these specific questions.

2a. At Earth's surface, what is its gravitational field due to its mass only?

2b. At Moon's surface, what is its gravitational field due to its mass only?

2c. At what point in space along a line between the two objects are the gravitational fields from each of them equal in magnitude?

2d. At that point, what is the total gravitational field, adding the two contributions as vectors?