Intergalactic medium: Quick Facts

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Interstellar medium Universe Star Galaxy Solar system Star cluster Cosmic microwave background Quasar Planet X-ray source Constellation Black hole

The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet

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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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