The gravity of the Sun (or star) keeps them in orbit.
All the planets that we know about spin, yes. Some spin faster or slower, or on a different axis, but they all spin.
Venus and Uranus?
It is called rotation.
Rotational time of the planets is random (the length of the planet's day), but the outer planets do spin faster than the inner planets.
Because there's nothing stopping them spinning.
Planets spin on their axes due to the conservation of angular momentum, which is a fundamental principle in physics. As planets formed from rotating clouds of gas and dust in space, their rotation continued as they condensed and solidified. This spinning motion is what causes planets to rotate on their axes.
All the planets that we know about spin, yes. Some spin faster or slower, or on a different axis, but they all spin.
The planet Jupiter must spin to keep its self up its called gravity and without it all the planets would go around space and collide of worse so it must "spin" to keep "afloat "
DS9 refers to the Star Trek spin off series, Star Trek: Deep Space Nine.
rotation
Yes.
Because It Has To Spin Like Planets Do
More space?
The spin of the Earth is residual from the formation of the solar system. The original "whirlpools" of matter started to spin as they orbited the sun due to the Coriolis force acting on them. This caused them to spin around the planets. his spin stayed after the planets firmed up into discrete balls
I would think nothing at all nothing's stopping them spinning- space doesn't offer any resistance
Absolutely. Spin creates centrifugal force, which actually works against gravity. When a object on a planet spins with the planet, the spin of the planet is constantly trying to fling said object off into space, where as gravity is constantly forcing the object toward the spinning body. If the spin became so great that it overcame the gravitational pull, the object would be flung into space. While spin does not actually affect the gravity of an object, it can reduce the amount of gravity an object on the surface experiences.
Planets spin on their axis as they orbit around a star. This rotation causes day and night cycles, and influences factors like climate and atmospheric circulation. The speed of the planet's spin can vary, with some planets spinning faster or slower than others.