"c / Earth orbit is becoming cluttered with space junk, and the pieces can be thought of as the “molecules” comprising an exotic kind of gas. These image shows the evolution of a cloud of debris arising from a 2007 Chinese test of an anti-satellite rocket. Panels 1-4 show the cloud five minutes, one hour, one day, and one month after the impact. The entropy seems to have maximized by panel 4."

This is directly from http://www.lightandmatter.com/html_books/0sn/ch05/ch05.html which is part of an on-line thermodynamics textbook that seems pretty good (a little basic). If you are interested in the problem this is creating you can look at the Kessler Syndrome and related links on Wikipedia.