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.
February 22, 2010
On December 31, 2009, the International Year of Astronomy (IYA) came to a close. Although IYA-related events still occurred in January 2010, the celebration's major goal, to inspire the world to look up at the sky, ended with the turn of the calendar.
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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