Tracking X-37B was a delight for amateur astronomers since, let's be honest, you can't really keep a secret in the sky from them. While NASA employees were drinking coffee, an amateur found a gaping hole in Jupiter, so not a lot gets by unpaid sky watchers.
Why is X-37B of so much interest? Because it is a low orbit space vehicle but can be landed on a runway with a joystick. The Boeing craft (launched on a Lockheed-Martin Atlas V, so it is different than a space shuttle ) was testing a number of advanced aerospace components. It weighs 11,000 pounds, is 9 1/2 feet tall and over 29 feet long and has a wingspan of less than 15 feet.
Returning from its classified mission of 7 months, it was declared a success and will go back up spring 2011, according to the Air Force.