Basic space flight is a nice tutorial course designed by the Jet Propulsion Laboratory to give a basic understanding the relationship between the concepts that cover deep space missions. You can find the tutorial at: http://solarsystem.nasa.gov/basics/index.php
EdX runs a cool course: Introduction to Aerospace Engineering: Astronautics and Human Spaceflight The course is presented by MIT Professor Jeffrey Hoffman, a former NASA astronaut who made five spaceflights and the first astronaut to log 1000 hours on the Space Shuttle He teaches you the core principles behind space travel and exploration. The course …
How hard can it be to build a rocket and actually send it into space…. This is a question every space exploration fan, will have asked him or herself at least once. Well these engineers are trying to find out the answer to this question and build the bigest rocket they can in just three weeks. They …