Is Momentum Conserved in a Collision Between Two Charged Planets?

[raman911]

Homework Statement

Imagine a universe that consists of nothing but two planets of unequal mass. The large planet has a large negative charge and the smaller planet has a large (but different) positive charge. Suppose that at some time these two planets collide. Will momentum be conserved during the collision? Explain.

The Attempt at a Solution

I Think momentum conserved because there no external force.
please help me

 

[Shooting Star]

Let's imagine it in this universe, far removed from other masses which may disturb them appreciably otherwise. Then, yes, total momentum is conserved, because of the reason you stated.