David H. Levy's Evening Stars: A permanent IYA
April 2010: The International Year of Astronomy may be over, but that doesn't mean we should stop gazing at the sky.
Contributed by David H. Levy
Published:
February 22, 2010
 The Galilean moons, named after their discoverer Galileo Galilei, provide visual proof of the complexity and beauty of the heavens. In this infrared image by the Hubble Space Telescope, two of the four moons are visible (Io, the white circle near the center, and Ganymede, the blue circle in the upper right), along with three of the moons’ shadows (Ganymede’s, Io’s, and Callisto’s, from left to right).
Photo by NASA/ESA/E. Karkoschka (University of Arizona) |
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