Want to explore the Mars Curiosity Rover's landing?

NASA's got a Java-based explorer, called Eyes on the Solar System, that allows you to see, in a simulation, where the Mars Curiosity Rover is currently at, or explore its landing by speeding it up or going backwards in time.  You can also rotate your view and zoom in and out.

You'll notice that there's a countdown timer to the bottom right, showing the time left to the next event / stage of the landing -- something quite useful if you're watching live and paying attention to NASA's UStream event.

While it is currently focused on the Curiosity Rover, as its namesake indicates, you can use it to explore the entire solar system, and specifically satellites.