... Henrietta Leavitt Calibrates the Stars . ... An Ion Drive for Deep Space 1 . ... Deep Space 1 is bound for asteroid 1992 KD in July 1999. ... Sometime in February, two of three long-lived Jovian storm systems known as "white ovals" apparently collided and merged -- forming what is now likely the second largest storm in the Solar System, after the famous Great Red Spot. ... This picture from the Hubble Space Telescope was taken on August 6, 1995 when the rings lined up sideways as seen from Earth. ...