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Aristotle – a Greek astronomer about 2300 years ago

● The Universe was split into two places – Earth and the Heavens.

● Earth was the centre of the Universe.

● Everything was made from four elements – Earth, Air, Fire and Water.

● Heaven was made of a fifth element and was perfect.

● The Sun and Moon and planets moved at a constant speed in perfect circles.

Ptolemy – a Greek astronomer about 2000 years ago

● The Earth was the centre of the Universe. Used the theories of Aristotle to develop his own ideas.

● All planets and the Sun and Moon went around the Earth. This model he called Geocentric, i.e. the Earth was the centre of everything

● The planets also moved in little circles as they moved around the Earth.

● The planets were attached to ‘crystal spheres’ which moved.

● One sphere didn’t move and had the fixed stars on it.

● The very edge of the Universe was called the ‘prime mover’ and it powered all the other movements.

The Mayans – people living in Central America about 1500 years ago

● The centre of the Mayan universe was a square pyramid.

● The Earth was split into four parts, each a different colour.

● The centre of the Earth was a fifth part.

● Heaven was held up by four sacred creatures.

● The Moon had a rabbit’s face.

● The Sun and Venus were created from two twins who beat the Lords of Death in ball games.

Copernicus – 16th century Polish astronomer

● Used observations of many things, including work by other astronomers.

● Combined these observations to make a simpler system of the Universe than Ptolemy.

● The Earth and planets went around the Sun. This model he called Heliocentric

● The Universe was much bigger than previously thought.

● The Sun was not the centre of the Universe, but only the centre of our solar system.

● Priest inserted an introduction into Copernicus’ book stating his book contained only ideas and had no proof.

Galileo – 17th Century Italian astronomer

● Used the first telescope to discover moons of Jupiter.

● Accurately plotted the movements of planets.

● Used these observations to confirm Copernicus’ idea of the Sun at the centre of the Solar System.

● Observed a supernova in 1604.

● Used the supernova as evidence that the heavens can change.

● Was in conflict with the Church and put under house arrest for the last 10 years of his life.

Aristotle – a Greek astronomer about 2300 years ago

● The Universe was split into two places – Earth and the Heavens.

● Earth was the centre of the Universe.

● Everything was made from four elements – Earth, Air, Fire and Water.

● Heaven was made of a fifth element and was perfect.

● The Sun and Moon and planets moved at a constant speed in perfect circles.

Ptolemy – a Greek astronomer about 2000 years ago

● The Earth was the centre of the Universe. Used the theories of Aristotle to develop his own ideas.

● All planets and the Sun and Moon went around the Earth. This model he called Geocentric, i.e. the Earth was the centre of everything

● The planets also moved in little circles as they moved around the Earth.

● The very edge of the Universe was called the ‘prime mover’ and it powered all the other movements.

The Mayans – people living in Central America about 1500 years ago

● The centre of the Mayan universe was a square pyramid.

● The Earth was split into four parts, each a different colour.

● The centre of the Earth was a fifth part.

● Heaven was held up by four sacred creatures.

● The Moon had a rabbit’s face.

● The Sun and Venus were created from two twins who beat the Lords of Death in ball games.

Copernicus – 16th century Polish astronomer

● Used observations of many things, including work by other astronomers.

● Combined these observations to make a simpler system of the Universe than Ptolemy.

● The Earth and planets went around the Sun. This model he called Heliocentric

● The Universe was much bigger than previously thought.

● The Sun was not the centre of the Universe, but only the centre of our solar system.

●

Galileo – 17th Century Italian astronomer

● Used the first telescope to discover moons of Jupiter.

● Accurately plotted the movements of planets.

● Used these observations to confirm Copernicus’ idea of the Sun at the centre of the Solar System.

● Observed a supernova in 1604.

● Used the supernova as evidence that the heavens can change.

● Was in conflict with the Church and put under house arrest for the last 10 years of his life.

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