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The idea of planets orbiting the Earth in perfect circles is primarily associated with the ancient Greek philosopher Claudius Ptolemy. In his geocentric model, outlined in the "Almagest," Ptolemy proposed that celestial bodies, including planets, moved in circular orbits around the Earth, using epicycles to account for their observed movements. This model dominated astronomical thinking for many centuries until the heliocentric theories of Copernicus and later developments in astronomy.

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1mo ago

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What is a planet orbiting another planet called?

A moon? I don't think a planet orbiting another planet would be called a planet.


The eccentricity of a planet's orbit describes?

The eccentricity of a planet's orbit describes how elliptical (or non-circular) the orbit is. It is a measure of how much the orbit deviates from a perfect circle. A value of 0 represents a perfect circle, while values closer to 1 indicate a more elongated orbit.


When you say that a planet has a highly eccentric orbit you mean that?

It deviates from a perfect circle by a considerable amount.


What is an exo-planet?

A planet orbiting a star other than the Sun.An exoplanet is a planet orbiting any other star out there, except the Sun.


What does the orbit of a planet look like?

The orbit of a planet is an ellipse with the Sun at one of its foci. This means the shape of the orbit is similar to a slightly flattened circle. The orbiting planet will travel along this path due to the gravitational pull of the Sun.


Is Mars' orbit a perfect circle?

No, Mars' orbit around the Sun is not a perfect circle but is rather an elongated ellipse. This means that Mars' distance from the Sun varies throughout its orbit, with its closest point called perihelion and its farthest point called aphelion.


What is the path of a planet or a satellite called?

A satellite is a body in orbit around another lager body. A probe is a machine sent to a specific place or specific course in space. Comment: That doesn't seem to answer the question. The curved path that a satellite follows is either a circle or an ellipse


What is earth orbiting the sun?

Earth orbiting the sun is a planet that is attracted to a star.


How many moons does mercury have orbiting it?

There are no moons orbiting the planet Mercury.


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Saturn does


Does earth orbit any planet?

No, Earth is a planet orbiting the Sun.


What is the third planet orbiting around the sun?

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