Why are galaxies mostly flat?

Originally Answered: Why are most galaxies mostly flat? If gravity pulls objects in, wouldn’t they be spherical? They rotate around the center of all gravity in the galaxy as they form. This rotation prevents most of the galaxies from turning globular, although such specimens are also among galaxies.

Why are planets rounded?

Planets are round because their gravitational field acts as though it originates from the center of the body and pulls everything toward it. The only way to get all the mass as close to planet’s center of gravity as possible is to form a sphere. The technical name for this process is “isostatic adjustment.”

Why are star systems flat?

Eventually, a portion of this material collapses toward the center, forming a star, and the spinning cloud begins to flatten into a disk due to the rotation. It’s out of this rotating protoplanetary disk of gas and dust that planets are born, resulting in a relatively flat solar system.

Can a planet not be round?

Planets on the other hand,have to to spherical in order to considered a planet. It’s one of the planetary laws. If it’s not spherical it’s a dwarf planet,a planet that’s not really a planet,like Humana and Makemake. Actually they are not all round, though most are close to round, held to that shape by gravity.

Why are planet rings flat?

Ultimately, planetary ring systems are flat because of the oblate (equatorially bulging) shapes of planets, which creates an asymmetric gravity field around the planets. Stellar debris disks don’t have these asymmetric gravity fields. They are flat, ultimately, because of the large angular momentum of the disk itself.

Why are galaxies not spherical?

As these objects collide any upward or downward motion is progressively cancelled out, while the conservation of angular momentum dictates that they must keep spinning around the same axis, resulting in a flat, disc-like shape.

Why are all planets round?

A planet is round because of gravity. A planet’s gravity pulls equally from all sides. Gravity pulls from the center to the edges like the spokes of a bicycle wheel. This makes the overall shape of a planet a sphere, which is a three-dimensional circle. The eight planets in our solar system differ in lots of ways. They are different sizes.

What is the shape of a planet’s gravity?

A planet’s gravity pulls equally from all sides. Gravity pulls from the center to the edges like the spokes of a bicycle wheel. This makes the overall shape of a planet a sphere, which is a three-dimensional circle. Big, small, but all round

Why do galaxies collapse in certain directions but not others?

The answer to your first question is just what you guessed: rotation. The flat (e.g., spiral) galaxies tend do be rotating, whereas the less flat ones (e.g., ellipticals) tend not to be. Conservation of angular momentum lets the rotating ones collapse along the direction of the rotation axis but not the other directions.

Why are planets shaped like spokes?

Gravity pulls from the center to the edges like the spokes of a bicycle wheel. This makes the overall shape of a planet a sphere, which is a three-dimensional circle. The eight planets in our solar system differ in lots of ways.