The six-day shower of debris on Jupiter, which ended at 4 p.m. EDT, prompted Net bombardment on Earth. The sites providing spectacular images of the actual collisions were some of the most popular. The Internet address at the National Space Science Data Center, for example, was hit with 5,400 accesses an hour during its peak period. Now that the Jupiter light show is history, the most trafficked locations are a lot less jammed. Reach the National Space Science Data Center at http://nssdc.gsfc.nasa.gov/sl9/comet_images.html.