# Changing Ideas About Space

Understand that ideas about the solar system changed over time: ancient people believed Earth was at the centre (geocentric model, Ptolemy), until Copernicus proposed the Sun was at the centre (heliocentric model), later confirmed by Galileo’s telescope observations

Builds on: Earth's Spin & Orbit (hard, https://ai.page/c/earth-s-spin-and-orbit/en.md)

Concept id: changing-ideas-about-space. Subject: science. Licence: CC BY-SA 4.0.

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