Photo of the day

Awesome, awesome “Advent calendar” of images from Hubble via In Focus:

The Shadow of Ganymede. On April 21, 2014, when Hubble was being used to monitor changes in Jupiter’s immense Great Red Spot (GRS) storm. During the exposures, the shadow of the Jovian moon Ganymede swept across the center of the GRS. This gave the giant planet the uncanny appearance of having a pupil in the center of a 10,000-mile-diameter “eye.” (NASA, ESA, A. Simon/Goddard Space Flight Center)

About Steve Greene
Professor of Political Science at NC State http://faculty.chass.ncsu.edu/shgreene

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