Magnitude: Quick Facts

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Photometry absolute magnitude integrated magnitude apparent magnitude bolometric magnitude Hertzsprung-Russell diagram UBV system North polar sequence colour-magnitude diagram brightness Eddington mass limit Quasar Sun Bellatrix Supernova Constellation Black hole Neutron star How Do We Know How Far Away the Stars Are?The life cycle of a star

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Astronomy: Study of extrasolar planetary systems

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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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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1 July 2002: The Solar and Heliospheric Observatory (SOHO) satellite reveals a massive solar eruption more than 30 times the Earth's diameter. The eruption formed when a loop of a magnetic field over the surface of the Sun trapped hot gas.

Brightest Star in the Solar System