"While we knew its motion varies slightly in its longitude, we didn't expect to see the size oscillate. As far as we know, it's not been identified before," said Amy Simon of NASA's Goddard Space Flight..
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NASA's Hubble Watches Jupiter's Great Red Spot Behave Like a Stress Ball - NASA Science
Astronomers have observed Jupiter's legendary Great Red Spot (GRS), an anticyclone large enough to swallow Earth, for at least 150 years. But there are always new surprises – especially when NASA's Hubble Space Telescope takes a close-up look at it. Hubble's new observations of the famous red... - science.nasa.gov