Propulsion Tutorial
Explains the different propulsion systems that could be used to send humans to Mars.

Swiss Propulsion Laboratory
Aims to develop systems to transport small civilian payloads into a low-earth orbit (LEO).

How Space Exploration Will Work
Illustrated narrative shows a number of advanced space concepts.

Earth-to-Orbit Transportation Bibliography
A look at the various propulsion technologies that could be used to provide cheap transport into orbit.

List of Space Propulsion Methods
Attempts to list all known space propulsion methods.

HobbySpace - Launch, Propulsion & Spaceflight Systems
Looks at the many types of launch vehicles and propulsion technologies that are in service or proposed.

Cosmos 1: the first solar sail
The Planetary Society is developing and conducting a privately funded solar sail project with Cosmos Studios. The spacecraft will be developed, launched and operated in Russia.

Propulsion Research Center
(part of Marshall Space Flight Center). Gives details on current research projects.

Solar-Thruster-Sailor
Solar Sail with hybrid propulsion, using light pressure and ion thruster to produce thrust. Spacecraft Building System to build large, light weight space structures in a fast and simple way.

The Sunflower Project
A proposed space transportation system which consists of two parts: rotocrane moving in an atmosphere only, and sunflower moving in a space plasma. Description of the theory and state of development.

Interstellar Missions
News on advanced propulsion technologies for space travel from universtites, organisations and companies.