Why are all? the planets perfectly round?

Question

Why aren't some square, or only half a planet?

Answer 1

Actually all planets are not exactly round.

The cause for their roundness is that all the planets were formed out of high pressure gasses.Nearly the time before the earth was formed,a giant mass of gasses were spinning in circular motion.All of their forces were concentrated towards the center.That is why there a molten lava under the ground.Because of the revolution of the gasses,a high pressure was built in the center.This is called as gravitational force.Due to this force and revolutionary motion of the gasses,the round shape was formed(sphericalness)

Answer 2

Planets are not all perfectly round, Earth for example is like a ball that is being pushed on the top and bottom, so it is slightly squashed, If you are interested in such things i would highly recommend reading Bill Bryson , A short history of nearly everything, He talks about such things in plain speak and is funny and thoroughly enjoyable read. Bits or half planets would not keep in orbit and would wobble about too much and I presume become asteroids? Earth would wobble more than it does if it wasnt being held stable by the moon.

Answer 3

The gravity of the planets is what pulls it together and gives its shape to the planets. the more gravity a planet has the more better shaped you would find depending on its size, also not all planets are same shapes and round we see them to be round because we are looking at them from a very far distance.

Answer 4

They are not perfectly round. They are in the shape of an oblate spheroid. As to why, the planets were formed from spinning clouds of dust particles which gradually accreted to form larger and larger particles with gravitational pull. As gravitational pull is basically equal in all directions, equal amounts of materiel are accreted on all surfaces. The spin of the planets and the gravitational pull of the sun and any moons, results in a bulge at the planetary equator giving the oblate spheroid shape.

Answer 5

Because round is the most economical shape that can be achieved by gravity. Due to their spin, and resulting centrifugal; force, the planets are not perfectly round.

Answer 6

The planets are not perfectly round (spherical). Even the earth is like a cutlet and flatter at the poles. (slightly)

There are odd shaped stones we call asteroids. Some of these are larger than pluto.

Answer 7

sphere is the only shape which has minimum volume but maximum density within that volume which renders it to be safe..otherwise these planets r not perfectly sphere they r spherical oblloid IN SHAPE .an while their rotation the centre of gravity puls it inside to attain minimum volume,.but they can't lose their density so with the passage of time they attain a spherical shape..

Answer 8

They are not they're slightly squashed down (elliptical). And they are round because there are equal forces all around the planets and push down on them all around making them spherical, they are in a vacuum.

Answer 9

They are round coz they have to go around the orbit. I dont think they could ever be flat like a square or diamond coz their shape has to be round to go around the orbit or anything scary can happen....

my answer might be a bit dumb but thats all i have to offer now.

Answer 10

the planets are not perfectly round as you think.. maybe there are some imperfections but you didn't realize it.. earth is one example..it is not perfectly round.. it is somewhat squished just like a plump tomato..