JOHN SANFORD / SCIENCE PHOTO LIBRARY JOHN SANFORD / SCIENCE PHOTO LIBRARY
Crescent Venus. Venus, the second planet form the sun, is the sixth largest planet with a diameter of 12,102 km. It shows phases because it is closer to the Sun than Earth and goes between the Sun and Earth's orbit. Photographed from Starhome Observatory, Springville, California, USA, in February 2009.
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