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The line between the two poles of the celestial body's rotation, or the straight line where the angular velocity and linear velocity of the celestial body's rotation are both zero.
The earth's rotation axis is the line between the pole of the South Pole and the pole of the North Pole, which is 90 degrees from the equator. The earth's rotation axis is also called the Earth's axis.
Ordinary planets, moons, etc. will rotate, and stars will also rotate.
planets
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planetsRotation period and angle between rotation axis and ecliptic:
Uranus rotation period: 15.5 hours 97.8 degrees (the angle between the equator and the orbital plane, and the angle between the rotation axis and the ecliptic is 7.8 degrees)
