In what ways do Earth's motions change over time?
1 Answer
Oct 27, 2016
In several different ways and they combine in interesting ways. I've linked in a video that does a nice job of explaining the various orbital wobbles:
Explanation:
The Earth has a lot of wobbles and such in its orbit around the Sun. Three things that these wobbles affect are:
orbital eccentricity - or how close to a circle the Earth moves around the Sun
axial obliquity - or how far the Earth tilts in its axis
precession - which is the wobble that has the axis point in different directions
This youtube video explains in detail how all this happens:
detailed video of Earth orbital wobbles
You may want to read up on Milankovitch cycles.
