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View of entire planet of Jupiter and set of three close-ups of its Red Spot

NASA, ESA, and A. Simon (GSFC)

Astronomers using the Hubble Space Telescope have discovered that Jupiter's legendary Great Red Spot is the smallest ever seen. The Hubble image at left is a view of the entire planet. The red spot, a monster storm in Jupiter's atmosphere, is at lower right.

The three close-up Hubble views on the right show that the red spot's size has decreased significantly between 1995 and 2014. In the 1995 image, the red spot was about 13,020 miles across. In the 2009 image, the trademark feature measured 11,130 miles across. The 2014 image reveals that the spot is only 10,250 miles wide.