NASA's Home Page
NASA's home page features space science, research and technology news for researchers as well as resources and information for students and educators
http://www.nasa.gov/home/index.html

NASA's Ames Research Center
NASA's premier astrobiology site at the NASA Ames Research Center , where modern astrobiology was defined
http://www.astrobiology.arc.nasa.gov/

NASA'S Astrobiology Magazine
The Astrobiology Magazine , supported by NASA, is full of news stories on a broad range of astrobiological topics
http://www.astrobio.net/

The NASA Astrobiology Institute
The NASA Astrobiology Institute leads collaborative multidisciplinary research and education in astrobiology and supports research teams from academia, institutes and NASA laboratories and centers.
http://nai.arc.nasa.gov/

NASA's Science Mission Directorate
NASA's Science Mission Directorate website provides information for scientific community, educators and the public
http://science.hq.nasa.gov/

Jet Propulsion Laboratory's Home Page
A NASA laboratory, the Jet Propulsion Laboratory's home page links to your favorite planetary missions
http://www.jpl.nasa.gov/

Exobiology at NASA's Ames Research Center
Exploring for Life in the Universe: selected research at NASA Ames Research Center
http://exobiology.nasa.gov/

European Space Agency (ESA) Home Page
The European Space Agency's home page links to their Mars and comet missions
http://www.esa.int/esaCP/index.html

Astrobiology at ESA
The astrobiology site of the European Space Agency
http://www.spaceflight.esa.int/users/index.cfm?act=default.page&level=1f&page=1856

Australian Centre for Astrobiology
Astrobiology Down Under - established in July 2001
http://aca.mq.edu.au/

U.K. Astrobiology Forum and Network
The United Kingdom Astrobiology Forum and Network is a body of the British National Space Center
http://www.astrobiologysociety.org/

Canadian Space Agency
This site reviews the Canadian Space Agency's involvement with NASA's mission to Mars
http://www.space.gc.ca/asc/index.html

Japan's Space Agency (JAXA)
Japan 's space agency has an interest in lunar origin and evolution
http://www.nasda.go.jp/index_e.html