Revise GCSE Physics


Question:What was the Geocentric model of the Universe and who invented it?

The Geocentric model, placed the Earth at the centre of both the Solar system and the whole Universe.

In the past, Man looked up and saw everything that was visible in the day and night time sky's moving around in a regular fashion. At the same time we could not detect any motion of the Earth itself, so the obvious inference was that the Earth was in fact at the centre and everything else moved around us.

Ptolomy (pronounced tolomay) invented the geocentric model in the second century CE; which is also known as the Ptolemaic model of the Universe.

Ptolomy though all the celestial bodies were fixed in place on giant glass spheres. The last sphere held all the stars which were thought to be unchanging.

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