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Models of the Universe [Geocentric to Heliocentric]

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It starts from the new moon then it goes to waning crescent then it goes to third quarter, next is the waning gibbous then it’s the full moon. After that it goes backwards to the start was is the new moon.  By Lacey

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Heracleides was a philosopher and astronomer. Heracleides was pupil from an Academy, he then took over it for a little. While he was in charge he taught that Mercury and Venus travel at the same apparent speed. He also taught a special type of handwriting called Atomism. He believed in the Geocentric theory but did not make a great impact on finding out which one was true.

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Khayyan was a Persian astronomer and mathematician. He was known for his poetry and sciences but look up astronomy. Khayyan invented the way of keeping time and that was the calendar. He researched many astronomical tables and came up with a new design of the calendar which was more accurate than the Julian and came close to the Gregorian. An amazing accomplishments was his calculation of the year to be 365.24219858156 days long, which is accurate to the sixth decimal place! By Tahlia

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100 years form Copernicus, Galileo the genius and investor took after the Heliocentric Model. He devised a telescope with could enlarge things up to 20 times. This gave Galileo the opportunity to prove the Heliocentric theory. He published his observations and went against the Church. He was sent to life imprisonment but his theory couldn't be stopped and other astronomers continued with his work and learnt the ways of the world and the heavens beyond. By Tahlia

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Over a thousand years later, Nicolaus came up with an amazing way at looking at the Earth. He believed in the Heliocentric system and put the the sun meaning helio, at the centre of the universe. Other star watchers had already believed the same but it was Nicolaus who bring this idea to the world. His ideas showed that the Earth spins on its axis which meant other planets spun at different times meaning the Sun would not be able to reach all the planets and that Sun was intact in the centre. By Tahlia

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Ptolemy was a mathematician and an astronomer. He believed that the Earth was the centre, one of his theories for this was that the Greek word for Earth is Geo meaning Geocentric. His famous work was called the Almagesti. Almagesti was a theory that the Earth and planets would move in a circle and Earth would move alone an equant. His flawed theory was believed for many centuries. By Tahlia

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Isaac Newton believed in Geocentric because he thought that earth was in the middle of the sun and the moon but we all know now that the sun is in the middle and all the planets orbit around the sun.  By Lacey

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Johannes Kepler believed in Heliocentric he just didn’t believe in Geocentric. By Lacey

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The Geocentric is also known as the Ptolemaic system. The Geocentric theory thinks that the earth is in the middle and everything orbits around it. By Lacey

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People thought that the earth was in the middle because people also thought the earth was flat and that’s why they thought it was in the middle, they didn’t think it would be able to live if it was in the moons place. By Lacey

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It is inaccurate because you can’t see the earth and we can’t feel it when it moves and we can see the sun and that it shines so bright in the middle of the sky that’s how we know that the sun is the middle.  By Lacey

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The Heliocentric model is a theory that is to be believed that the Sun is in the middle of the universe and Earth and the other planets orbit around it. In Samos a small island near Turkey, they built a model of the Heliocentric Model as early as 200 B.C. but the Geocentric Model still stayed the main belief or focus. By Tahlia

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The Heliocentric theory didn't gain popularity until the 6th century and the Geocentric model was to be be believed. People stared to believe Heliocentric because astronomers realised that other planets would need sun not just Earth and in this case the Sun would have to be in the middle of the universe. By Tahlia

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As technology and resources became more skilled astronomers were able to find out more information about the Heliocentric Model. The proof that set nearly every mind into believing this model was that astronomer Nicholas Copernicus realised that the Earth is the 3rd planet and that stars don't rotate around the Earth but instead the Earth rotates around the stars. To this day the Heliocentric Model is accurate and that Earth is the third planet and rotates around the sun. By Tahlia