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relative orbit


'relative orbit' can also refer to...

 

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The orbit of a celestial object with respect to the body it is orbiting. The Moon and Earth perform elliptical orbits about their centre of mass, a point about 1600 km below the Earth's surface. The Moon's relative orbit about the Earth is of the same shape, but with the Earth's centre at a focus of the ellipse. Similarly, the planets have relative orbits about the Sun and each component of a binary star has a relative orbit with respect to the other.

Subjects: Astronomy and Astrophysics.


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