Astronomy › Section B · Observing the sky › Topic B.4
The birth of modern astronomy
Between 1543 and the 1630s, Earth lost its place at the centre of the universe. Copernicus offered a Sun-centred model, and Galileo, armed with a telescope and a new way of studying motion, found evidence the old view could not explain.
In this topic
- Knowledge carried across centuries
- Copernicus and the Sun-centred model
- What the new model explained
- Worked example: a planet's true period
- Why it was not accepted at once
- From Tycho to Kepler
- Galileo and the science of motion
- Galileo turns a telescope on the sky
- Worked example: reading the phases of Venus
- Conflict with the Church
- Common mistakes to avoid
- Key takeaways
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