Hubble Space Telescope View of Comet Fragment G Impact Zone This image shows the impact zone on Jupiter of fragment G of Comet Shoemaker-Levy 9. The image was made in green light with the Planetary Camera channel of the Wide Field Planetary Camera 2 (WFPC2). Data for the image were obtained in the early morning hours of July 18, 1994. The impact site is visible as a complex pattern of circles seen in the lower left of the partial planet image. The small dark feature to the left of the pattern of circles is the impact site of fragment D. The dark, sharp ring at the site of the fragment G impact is 80% of the size of the Earth. Comet Shoemaker-Levy 9 broke up into 21 fragments during a close passage by Jupiter in July of 1992. Fragment G was one of the brightest and likely the largest of the 21 fragments. Fragments A-H have impacted the planet. Remaining fragments will continue to impact Jupiter through July 22, 1994. Pre-encounter estimates of the energy of the combined impacts are highly uncertain, and range up to that of a million hydrogen bombs (a million megatons of TNT). Jupiter was approximately 477 million miles (767 million kilometers) from Earth when the image was taken. Credit: Dr. Heidi Hammel, Massachusetts Institute of Technology, NASA HST. Hubble Space Telescope Science Institute 3700 San Martin Drive Baltimore, MD 21218 (410) 338-4707