How Rocket Engines Work

Venturing into space is complicated. There is so much to take into consideration, including orbital mechanics, heat management, space debris and more. But the hardest part of space exploration may be getting off the ground.

Rocket engines are, on the one hand, so simple that you can build and fly your own model rockets very inexpensively (see the links on the last page of the article for… » Full Story on HowStuffWorks