Why do planets rotates around the sun on the ecliptic plane why don they rotates at different degrees around the sun Also Same question but with stars around galaxies?
In fact, there are no two planets that orbit in exactly the same plane. The planets orbit close to the ecliptic, but not exactly on it. This is so because the planets formed from the gigantic disk of rubble and gases that formed around the young sun. Many galaxies are basically in the form of a disk as well, including the Milky Way. There are some galaxies that have different shapes. Materials gather into disks probably because of the inherent irregular shapes of the original clouds of material, and characteristics that come about as the materials begin to fall toward the center and then revolve around the cloud’s center of gravity.
