Why are planets round and galaxies flat?

Answer 1

Well sweetheart, planets are round because gravity pulls everything towards their center, squishing them into that nice circular shape. Galaxies, on the other hand, are like my wrinkly old tush - they spin around, causing the gas and stars to flatten out into a disk shape. It's all just physics mumbo jumbo, darling.

Answer 2

Planets are round due to gravity pulling matter towards the center, creating a spherical shape. Galaxies are flat because of the rotation of stars and gas within them, causing them to flatten out into a disk shape.

Answer 3

Well, the planets are usually round because of gravity – gravity pulls everything in towards the center, so over time, things shaped like planets tend to become round. Galaxies are flat because of the way they spin, it causes them to flatten out into a disk shape. Nature takes each and every one of us on a unique journey to find our own shape and path in this beautiful universe.

Answer 4

Oh, dude, planets are round because of gravity squishing them into shape like a soggy soccer ball. And galaxies are flat because they spun so hard in their space dance that they pancaked themselves out. It's like cosmic physics playing a giant game of frisbee with the universe.

Answer 5

Planets are round due to a process called hydrostatic equilibrium, which is the balance between gravity pulling inward and the internal pressure pushing outward. When a planet forms and accumulates mass, its gravity causes material to be pulled towards the center. This material presses down on the layers below, creating pressure that pushes back against the force of gravity. Over time, this pressure evens out and causes the planet to become rounded.

Galaxies, on the other hand, are flat because of angular momentum conservation during their formation. As a galaxy forms from a rotating cloud of gas and dust, the conservation of angular momentum leads to the spinning motion being preserved. This causes the material to flatten out into a disk shape, similar to a spinning Pizza dough flattening out due to the conservation of angular momentum. The material in the disk orbits around the center of the galaxy, forming a flat structure with a bulging center, where the majority of the mass is concentrated.

In summary, planets are round due to the balance between gravity and internal pressure, while galaxies are flat due to the conservation of angular momentum during their formation.