GURPS Space - assistance

[Agemegos]

Originally Posted by Whill

Would it be possible for an Earth-mass world to stay in a Lagrange point of a star and a very massive gas giant?

L4 or L5, yes. L1, L2, or L3, no. The gas giant has to be at least about 25 times the mass of the terrestrial.

In the context of a planet orbiting a star, these trajectories are also called the leading and trailing Trojan points.