December 4, 2012
Day 4 of the 2012 Hubble Space Telescope Advent Calendar, one of 25 photos (eventually). Jupiter’s volcanic moon Io passing above the turbulent clouds of the giant planet, on July 24, 1996. The conspicuous black spot on Jupiter is Io’s shadow. The shadow is about the same size as Io (3,640 kilometers or 2,262 miles across) and sweeps across the face of Jupiter at 17 kilometers per second (38,000 miles per hour). The smallest details visible on Io and Jupiter are about 100 miles across. Bright patches visible on Io are regions of sulfur dioxide frost. (J. Spencer, Lowell Observatory, and NASA)

Day 4 of the 2012 Hubble Space Telescope Advent Calendar, one of 25 photos (eventually). Jupiter’s volcanic moon Io passing above the turbulent clouds of the giant planet, on July 24, 1996. The conspicuous black spot on Jupiter is Io’s shadow. The shadow is about the same size as Io (3,640 kilometers or 2,262 miles across) and sweeps across the face of Jupiter at 17 kilometers per second (38,000 miles per hour). The smallest details visible on Io and Jupiter are about 100 miles across. Bright patches visible on Io are regions of sulfur dioxide frost. (J. Spencer, Lowell Observatory, and NASA)

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Filed under: hubble nasa awesome Astronomy 
  1. strawberriesonasunnyday reblogged this from atlanticinfocus
  2. abject-perversity reblogged this from atlanticinfocus and added:
    A new amazing photo every day- such a great advent calendar.
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