This category contains modern (post-Newton) theories about Solar System bodies, their formation, and other important, mostly cataclysmic, events that deeply affected the orbits and surfaces of the planets.
Human discoveries and space exploration events belong elsewhere. This is about big boulders tumbling around.
This category has the following 4 subcategories, out of 4 total.
The following 23 pages are in this category, out of 23 total. This list may not reflect recent changes.