Hubble Sees Neptune's Mysterious Shrinking Storm (image) NASA/Goddard Space Flight Center Share Print E-Mail Caption This series of Hubble Space Telescope images taken over 2 years tracks the demise of a giant dark vortex on the planet Neptune. The oval-shaped spot has shrunk from 3,100 miles across its long axis to 2,300 miles across, over the Hubble observation period. Credit Credits: NASA, ESA, and M.H. Wong and A.I. Hsu (UC Berkeley) Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.