| Trash dumps, space fights, or mechanical breakdowns could all leave various sized pieces of often-viable space junk floating around. |
| Hubble and Atlantis are flying in a 350-mile high orbit littered with space junk. |
| Correlated targets are various types of space junk tracked and kept in Air Force computers while uncorrelated targets are unknowns. |
| The more uncontrolled space junk floating around, the more dangerous orbital navigation through it. |
| Astronauts Steven Swanson and Joseph Acaba said they did not worry about space junk when they're floating outside. |
| More than just an aesthetic problem, space junk can crash into satellites and endanger ships passing through on their way to deeper space. |
