Jupiter and Its Shrinking Great Red Spot

Jupiter's monster storm, the Great Red Spot, was once so large that three Earths would fit inside it. But new measurements by the Hubble Space Telescope reveal that the largest storm in our solar system has downsized significantly. The red spot, which has been raging for at least a hundred years, is only about the width of one Earth today. What is happening? One possibility is that some unknown activity in the planet's atmosphere may be draining energy and weakening the storm, causing it to shrink.