This is a set of six web pages, authored and curated by David P. Stern, describing four unconventional methods of accelerating spacecraft. These are using cannons, nuclear power, solar sails and ion rockets....

This site, hosted by the University of Washington's Earth and Space Sciences Program, discusses an advanced plasma propulsion system that will enable spacecraft to attain unprecedented speeds, with minimal energy and...

There are many things in this world that are described as not being as difficult as rocket science. Then, of course, there is the actual science behind rockets. Understandably, this can be difficult for budding space...

Authored and curated by David P. Stern, This page, part of "From Stargazers to Starships," is devoted to the story of Robert H. Goddard and his contributions. Biographical details of Goddard's life and career are...

This site, created by author Robert Braeuning, features material on orbital mechanics, propulsion, rocket hardware, space centers and missions. It includes definitions of important terms and black-and-white diagrams. The...