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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.
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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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Earthshine

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Earthshine, sunlight reflected from the Earth, especially that reflected to the Moon and back again. For a few days before and after New Moon, this doubly reflected earthshine is powerful enough to make the whole Moon visible.

At this time an observer on the Moon would see the Earth as a bright body, four times the diameter of the Moon as seen from Earth, almost completely illuminated by the Sun. The phases of the Earth and Moon are complementary, so that the Earth is near full when the Moon is near new, and the earthshine then is strongest.

This article was most recently revised and updated by Amy Tikkanen.