This is a composite photo, assembled from separate images of
Jupiter and Comet P/Shoemaker-Levy 9, as imaged by the Wide
Field & Planetary Camera 2 (WFPC2), aboard. NASA's Hubble Space
Telescope (HST). Jupiter was imaged on May 18, 1 994, when the
giant planet was at a distance of 420 million miles (670 million
km) from Earth. This "true-color" picture was assembled from
separate HST exposures in red, blue, and green light. Jupiter's
rotation between exposures creates the blue and red fringe on
either side of the disk. HST can resolve details in Jupiter's
magnificent cloud belts and zones as small as 200 miles (320 km)
across (wide field mode). This detailed view is only surpassed
by images from spacecraft that have traveled to Jupiter. The
dark spot on the disk of Jupiter is the shadow of the inner moon
lo. This volcanic moon appears as an orange and yellow disk just
to the upper right of the shadow. Though lo is approximately the
size of Earth's Moon (but 2,000 times farther away), HST can
resolve surface d