Blog by Crew Commander Casey Stedman:

“I”m the navigator, I have a right to know where I’m going!” 

Astronaut Don Eisle, prior to his Apollo 7 flight

One of the most important aspects of space exploration is the missions undertaken by the unmanned probes that have been sent throughout our Solar System.  Each of these spacecraft investigated the natural phenomena of our cosmic neighborhood. With names like Mariner, Voyager, and Magellan, these probes have been instrumental in helping mankind understand the planets other than our own….(more)