If you look at the planets in the universe, it looks like you've only seen a round shapes.
Is there any other shape?
493 2016-03-26 Gentleman
When a planet is first formed, it is rounded by the rotational force because the gases start to rotate as they gather.
The rotational force is constant in all directions, so it has to be rounded.
It's because the gravitational pull works in all directions.
They all have the shape of a sphere because they're all pulling at a constant level.
And because those spheres rotate, they become elliptical.
Overall, it's an oval shape,
In a way, the earth, mountains, fields, and so on, too.
It's because of gravity.
In the case of gravity, although it is a weak force, it is proportional to the mass, so if you have a huge mass, this force is also huge.
And gravity works in all directions, so it forms a sphere.
So if you look at small-mass asteroids, they're more of a variety of shapes than a roll.
It becomes a bumpy planet with no fixed shape.
In the case of planets, they don't have the perfect shape of a sphere because they all rotate.
It's shaped like an oval.
So the Earth also rotates, so it's longer east-west than north-south.
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