BABAK TAFRESHI / SCIENCE PHOTO LIBRARY BABAK TAFRESHI / SCIENCE PHOTO LIBRARY
Total solar eclipse. Solar eclipses occur when the Moon passes between the Earth and the Sun. The solar corona (yellow) has been revealed here at the moment of totality. This outer solar layer comprises rarefied gases at very high temperatures, and is usually hidden by the glare from the surface of the Sun. Mercury (close to, and above and left of the Sun) and Venus (far centre left) are also seen here. Photographed in the Altai Mountains, Siberia, Russia, in August 2008.
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