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a group of people that invaded India and developed the caste system

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Mark Greenholt

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3y ago

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Who changed the idea of the earth centered solar system to a sun centered solar system?

Copernicus


How can there be an earth centered solar system?

There can't.


How many planets are in the Earth-Centered System?

In theory, it is the same number as in the Sun-centered system, except that the Earth was usually not considered as a planet.However, the Earth-centered system was abandoned before the planetsbeyond Saturn were discovered.So, in fact there were only 5 planets in the old Earth-centered system.They were: Mercury, Venus, Mars, Jupiter and Saturn.I think that's the best answer.A complication is that the Sun and Moon were often referred to as "planets" by the ancient astronomers. So that makes the answer 7 "planets" .Indeed Kepler was obsessed with trying to find reasons for there being seven"planets":Sun, Moon, Mercury, Venus, Mars, Jupiter and Saturn.In the Earth centered system there were just 5 planets, because Uranus and Neptune were discovered after the Sun centered system replaced it.


Which object orbits earth in both the earth centered and sun centered models of our solar system?

The Moon is the object that orbits Earth in both the Earth-centered (geocentric) and Sun-centered (heliocentric) models of our solar system. In the geocentric model, the Moon orbits around the Earth, while in the heliocentric model, both the Earth and the Moon orbit the Sun, with the Moon continuing to orbit the Earth as it does so.


Who is credited with improving the telescope and advocating the theory of a Sun-centered solar system?

Galileo.

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