Are the ice giants (or any solar system planets) still migrating in their orbits, the way the Moon orbits Earth from slightly farther away each year?
Glen Hicks
Monument, Colorado
The ice giants are migrating very little, and any migration that they undergo is certainly not for the same reason that Earth’s Moon is moving away from us. Many factors affect orbits of large bodies, which are actively fluctuating, if slightly. But two key factors are tidal interactions and the distance bet