Uranus. Scientists say it was hit by some kind of large object.
The gas planets are Jupiter, which is the biggest planet, Saturn, Uranus which rotates up and down not side to side, and finally Neptune.
Uranus and Venus
Uranus is the planet that rotates on its side, with its axis tilted at a steep angle relative to its orbit around the Sun. This unique orientation causes Uranus to essentially roll along its orbital path, making it appear to rotate from top to bottom instead of side to side like most other planets.
Uranus is the only outer planet (and only planet in our solar system) that rotates on its side.
Retrograde rotation is when a planet rotates in a direction opposite to the majority of planets in our solar system. The planet Venus rotates in retrograde, meaning it spins clockwise on its axis when viewed from above its north pole. This is in contrast to the counterclockwise rotation of most planets, including Earth.
Uranus is the planet that rotates on its side. Its axis is tilted at an angle of about 98 degrees relative to its orbit around the Sun, causing it to essentially roll on its side as it orbits.
Uranus, with a tilt of 98°. All planets have some tilt, but Uranus' tilt is so extreme, it rotates on its side.
Uranus rotates on its side as seen from Earth. Its axis of rotation is tilted at an angle of approximately 98 degrees, causing it to appear as though it is rotating on its side compared to most other planets in our solar system.
The Earth, and all rotating planets, rotates on its axis.
Uranus rotates at 97degrees from the ecliptic plane in other words it is tilted on its side
Major PlanetsVenus is the only major planet known to rotate clockwise. Uranus is tilted on its side, so the rotation direction is ambiguous.Dwarf PlanetsAs for the five dwarf planets, Pluto also rotates on its side, so it's direction is ambiguous as well. And the Rotation of Eris is unknown.
Uranus has the coldest atmosphere at -224C on average. Something that is unique about Uranus is that it has 22 moons. Also, it rotates on its side instead of upright.There are two odd things about the rotation of Uranus. Firstly it is tilted at 98o or 8o past horizontal (it rotates on its side). It also rotates backwards compared to the other planets except for Venus that also rotates backwards.