Those who use relativity say that geocentrism can be right and is just as valid as heliocentrism or any other centrism. That’s correct! But the problem is that using relativity by definition means that there is no One True Frame. So if you use relativity to say geocentrism can really be Geocentrism, you’re wrong.
Q. Why is geocentric theory wrong?
The first big problem with the geocentric model was the retrograde motion of planets like Mars. His model has the planets moving around the Sun in circular orbits. This can explain retrograde motion, but his model doesn’t fit all the planetary position data that well.
Q. What disproved the geocentric theory?
Instead, Galileo disproved the Ptolemaic theory, sanctioned for centuries by the Church, which held the Earth to be the central and principal object in the universe, about which all celestial objects orbited.
Q. What is correct in heliocentric model?
The word “helios” in Greek means “sun.” Heliocentric means that the sun is at the center. A heliocentric system is one in which the planets revolve around a fixed sun. Thus Mercury, Venus, the Earth, Mars, Jupiter and Saturn all revolve around the sun.
Q. What does Kepler’s 3rd law say?
Kepler’s Third Law: the squares of the orbital periods of the planets are directly proportional to the cubes of the semi major axes of their orbits. Kepler’s Third Law implies that the period for a planet to orbit the Sun increases rapidly with the radius of its orbit.
Q. What was the greatest contribution of Tycho Brahe to astronomy?
What was Tycho Brahe’s greatest contribution to astronomy? He first used the telescope to make extensive astronomical observations. He determined that the planets orbit the Sun in elliptical orbits. He proposed some simple laws that govern the motion of the planets and other objects.
Q. What is the main reason that Tycho Brahe needs Kepler?
Answer: To deduce a universal theory for motion of planets, Kepler needed data which supports heliocentric model, and Brahe was having records which deviated from the Ptolemic model and Kepler believed in Brahe. That’s why Kepler was in need of Brahe’s data.
Q. How did Brahe pave the way for Kepler’s discovery?
Brahe believed in a model of the Universe with the Sun (rayed disk) orbiting the Earth (black dot), but the other planets (symbols) orbiting the Sun. In an attempt to prove his theory, Brahe compiled extensive astronomical records, which Kepler eventually used to prove heliocentrism and to calculate the orbital laws.
