The European Space Agency, NASA, the Jet Propulsion Laboratory and University of Arizona have put together this excellent simulation of a landing on Titan, based on the Huygens Descent Imager/Spectral Radiometer landing on Saturn’s moon Titan on January 14, 2005:

(Thanks to the Astronomy Picture of the Day website, which featured it today and has more information about the mission.)

Here is a slide show of real images from the Huygens probe, as well as links to more information about the mission.

Of note, Christiaan Huygens discovered Titan in 1655.