I'm really impressed that this was someone's undergrad project. All the kids aren't hopeless.
To Chris' point, it really is amazing how much junk is out there now. Totally unscientific, but I was averaging "debris" nine out of every ten clicks when clicking randomly.
The really interesting group (drop down menu in the upper left on the page) is the Iridium 33 crash debris group. That's a lot of space shrapnel!