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One is revolution motion (the planet’s motion around the sun), and the other is rotation motion (the planet’s motion around its own axis). While revolution around the sun in an almost elliptical orbit, all the planets rotate around their own axis.
The Earth takes twenty-four hours to complete a rotation, while it takes 365 days for the Earth to complete a revolution. Revolution happens when one body moves around another, while rotation is the movement of a body around its own axis.
10 Ιαν 2020 · When that happens, the outer object is revolving around the axis of rotation. Examples of revolution would be a ball on the end of a string, or a planet going around a star. However, in the case of planets revolving around stars, the motion is also commonly referred to as an orbit.
18 Ιουν 2014 · A year is defined as the time it takes a planet to complete one revolution of the Sun, for Earth this is just over 365 days. This is also known as the orbital period. Unsurprisingly the the length of each planet’s year correlates with its distance from the Sun as seen in the graph above.
14 Απρ 2003 · The planets all revolve around the sun in the same direction and in virtually the same plane. In addition, they all rotate in the same general direction, with the exceptions of Venus and Uranus.
Given an understanding of the Earth's suite of motions -- rotation on axis, precession, nutation, short-term polar motions, and revolution around the Sun -- and given knowledge of an observer's location in latitude and longitude, meaningful observations can be made.
All planets and moons both rotate and revolve; just as the Earth rotates on its axis once a day, and revolves around the Sun once a year. The Moon is interesting because it rotates only once on its axis each time it revolves around the Earth.
