heliometer

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Topics

astronomical observatory astrolabe parallax How Do We Know How Far Away the Stars Are?proper motion gravitational microlensing zone of avoidance

Key People

Gill, Sir David

Sir David Gill

Scottish astronomer

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John Dollond

British optician

Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.

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