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Mars, and all the other planets, have oval-shaped, or eliptical, orbits.
Isaac Newton used a refracting telescope and calculus, which he invented to map the orbits.
It wasn't a scientist but two clock makers, George Graham and Thomas Tompion who made the first Orrery circa 1704. It was updated as more planets were discovered.
It was Ptolemy's model. Ptolemy's model came from ancient times while Copernicus's was much later (1543).Both models represented the planets' orbits by using combinations of circles and epicycles to explain the way the planets move among the stars.Copernicus found that the orbits of the inner planets could be explained more simply. That is to say that the epicycles used for all the orbits were smaller, and for the inner planets a lot smaller.Both models represented the planets' positions with reasonable accuracy given the crude observational methods used in those days.Until gravity and the laws of dynamics were discovered about 150 years after the publication of Copernicus's system, there was no way of deciding which model was the 'right' one.
The terms "outer planet" and "inner planet" are only used for planets. Pluto is not a planet, and it orbits beyond the outer planets.
This was because the orbits of those planets suggested there was something pulling in the direction of the belt. When astronomers looked there, they did not find a planet, but instead a collection of asteroids. It was these that were pulling on the planets.
Mars, and all the other planets, have oval-shaped, or eliptical, orbits.
He used the reflecting telescope and calculus to map the orbits of planets and satellites.
Copernicus
Isaac Newton used a refracting telescope and calculus, which he invented to map the orbits.
Patrica Anex She's a really good scientist.
There are eight planets; Mercury; Venus; Earth ( of course!); Mars; Jupiter; Saturn; Uranus; and Neptune. There used to be nine planets but scientist believe that Pluto is a Dwarf Planet.
a nigggerteen
Tycho Brahe designed new equipment to measure planets' positions with unprecedented accuracy. Tycho's observations of the planets' orbits led to his alternative model which still had the Earth at the centre with the Sun orbiting it, but with the five other known planets orbiting the Sun. But Tycho's measurements were used by his assistant Kepler to produce an entirely new theory in 1609 with the planets in elliptical orbits, all orbiting the Sun as in Copernicus's model of 1543. Kepler's theory is still used today. It's important to remember that the theories of Ptolemy and Copernicus are not 'wrong', it would be better to say they are not as accurate as Kepler's theory. As models, all three of them predict the planets' positions fairly accurately.
It wasn't a scientist but two clock makers, George Graham and Thomas Tompion who made the first Orrery circa 1704. It was updated as more planets were discovered.
It was Ptolemy's model. Ptolemy's model came from ancient times while Copernicus's was much later (1543).Both models represented the planets' orbits by using combinations of circles and epicycles to explain the way the planets move among the stars.Copernicus found that the orbits of the inner planets could be explained more simply. That is to say that the epicycles used for all the orbits were smaller, and for the inner planets a lot smaller.Both models represented the planets' positions with reasonable accuracy given the crude observational methods used in those days.Until gravity and the laws of dynamics were discovered about 150 years after the publication of Copernicus's system, there was no way of deciding which model was the 'right' one.
Astronomy uses both physics and chemistry. An example of physics is the study of gravity and the planets' orbits round the Sun. Chemistry is used to study what stars are made of or what the planets' atmospheres consist of.