This is not a SFW instance. NSFW communities will be tagged, and efforts will be made to keep SFW communities clean, but proceed at your own comfort level.
Not all galaxies are flat, and the stars in galaxies are sperated by enormous distances.
It’s the difference between Saturn and its rings. Saturn the plantet collapsed into a spheroid. The rings are pieces of stuff, not solid. Of all the stuff in the rings were thrown together into one solid clump, it would be a spheroid, too.
A galaxy isn’t a planet. Planets themselves are rarely perfect spheres. Earth is actually an oblate spheroid. Solar systems also exhibit planar geometry. They all spin. The angular momentum is enough to overcome the gravitational pull. If that momentum was not enough to overcome gravity, all that mass would collapse into a spherical object. Depending on how much mass would determine what kind of celestial body it is.
Yep, as are solar systems. But when they collapse in to single objects, those objects end up spherical once they’re about a third the size of our moon (or even less than that if they’re icy/gaseous).
… but galaxies are “flat”?
Not all galaxies are flat, and the stars in galaxies are sperated by enormous distances.
It’s the difference between Saturn and its rings. Saturn the plantet collapsed into a spheroid. The rings are pieces of stuff, not solid. Of all the stuff in the rings were thrown together into one solid clump, it would be a spheroid, too.
And I think we’re pretty lucky to see Saturn’s rings. Wait a few million years and they will collapse into a moon.
A galaxy isn’t a planet. Planets themselves are rarely perfect spheres. Earth is actually an oblate spheroid. Solar systems also exhibit planar geometry. They all spin. The angular momentum is enough to overcome the gravitational pull. If that momentum was not enough to overcome gravity, all that mass would collapse into a spherical object. Depending on how much mass would determine what kind of celestial body it is.
Yep, as are solar systems. But when they collapse in to single objects, those objects end up spherical once they’re about a third the size of our moon (or even less than that if they’re icy/gaseous).