As you probably guessed, we didn't write the space book from nothing. Below is the list of the sources we used (mainly books). We recommend all of them for further reading.
- Becklake, John. History of Rocketry and Astronautics. San Diego: American Astronautical Society, 1995.

- Bill Arnett. The Nine Planets http://www.nineplanets.org. Last visited: August, 2001.

- Booth, Nicholas. The Encyclopedia of Space. New York: Mallard Press, 1990.

- Branley, Franklyn. The Sun and The Solar System. New York: Twenty-First Century Books, 1996

- Braun, Wernher. History of Rocketry and Space Travel. New York: Thomas Y. Crowell Co, 1966.

- Bredeson, Carmen. Gus Grissom: A Space Biography. Springfield N.J.: Enslow Publishers, 1998

- Bredeson, Carmen. Neil Armstrong: A Space Biography. Springfield N.J.: Enslow Publishers, 1998

- Calvin J. Hamilton. Views of the Solar System http://www.solarviews.com/eng/homepage.htm. Last visited: August, 2001.

- Clay, Rebecca. Space Travel and Exploration. New York: Twenty-First Century Books, 1997

- Clay, Rebecca. Stars and Galaxies. New York: Twenty-First Century Books, 1997

- Cole, Michael. Apollo 11: First Moon Landing. Springfield N.J.: Enslow Publishers, 1995

- Cole, Michael. Apollo 13: Space Emergency. Springfield N.J.: Enslow Publishers, 1995

- Cole, Michael. Columbia: First Flight of the Space Shuttle. Springfield N.J.: Enslow Publishers, 1995

- Cole, Michael. Friendship 7: First American In Orbit. Springfield N.J.: Enslow Publishers, 1995

- Cole, Michael. Friendship 7: First American In Orbit. Springfield N.J.: Enslow Publishers, 1995

- Cole, Michael. Galileo Spacecraft: Mission To Jupiter. Springfield N.J.: Enslow Publishers, 1995

- Cole, Michael. Hubble Space Telescope: Exploring the Universe. Springfield N.J.: Enslow Publishers, 1999

- Cole, Michael. International Space Station: A Space Mission. Springfield N.J.: Enslow Publishers, 1999

- Cole, Michael. Living on Mars:Mission To The Red Planet. Springfield N.J.: Enslow Publishers, 1999

- Cole, Michael. Space Emergency: Astronauts In Danger. Springfield N.J.: Enslow Publishers, 2000

- Cole, Michael. Space Launch Disaster: When Liftoff Goes Wrong. Springfield N.J.: Enslow Publishers, 2000

- Cole, Michael. Vostok 1: First Human In Space. Springfield N.J.: Enslow Publishers, 1995

- Corliss, William. Propulsion Systems for Space Flight. New York: McGraw-Hill Book Company, Inc, 1960.

- Cosmiverse Reference Library http://www.cosmiverse.com/reflib/index.htm. Last Visited: July, 2001

- Dewaard, Nancy. History of NASA: America's Voyage to the Stars. New York: Exeter Books, 1984.

- Dr. Tony Phillips. Much Ado About Pluto http://science.nasa.gov/newhome/headlines/ast17feb99_1.htm. Last visited: August, 2001.

- Farbman, Melinda. Spacechimp: NASA's Ape In Space. Springfield N.J.: Enslow Publishers, 2000

- Gallant, Roy. National Geographic Picture Atlas of, Our Universe. National Geographic Society, 1986.

- Gartmann, Heinz. The Men Behind the Space Rockets. London: Wyman and Sons Ltd., 1955.

- Hamilton Calvin. Views of the Solar System http://www.solarviews.com/eng/homepage.htm. Last Visited: July, 2001

- Human Space Flight http://spaceflight.nasa.gov/history/apollo/. Last visited: August, 2001.

- Jeffery, Laura. Guion Bluford: A Space Biography. Springfield N.J.: Enslow Publishers, 1998

- Kallen, Stuart. Exploring the Origins of the Universe. New York: Twenty-First Century Books, 1997

- Kerrod, Robin. The Illustrated History of NASA. New York: Gallery Books, 1986.

- Kramer, Barbara. John Glenn: A Space Biography. Springfield N.J.: Enslow Publishers, 1998

- Kramer, Barbara. Sally Ride: A Space Biography. Springfield N.J.: Enslow Publishers, 1998

- Ley, Willy. Rockets, Missiles, and Men in Space. New York: The Viking Press, 1968.

- Liftoff to Space Exploration http://liftoff.msfc.nasa.gov. Last Visited: July, 2001

- Macaulay, David. The Way Things Work. Boston: Houghton Mifflin Company, 1988.

- Marc Millis. Warp Drive When? http://www.grc.nasa.gov/WWW/PAO/warp.htm. Last visited: August, 2001

- March, Carole. Unidentified Flying Objects and Extraterrestrial Life. New York: Twenty-First Century Books, 1996

- Marsh Carole. Asteroids, Comets, and Meteors. New York: Twenty-First Century Books, 1996

- Moore, Patrick. Space. London: Lutterworth Press, 1968.

- NASA Home Page http://www.nasa.gov/. Last Visited: July, 2001

- NASA Jet Propulsion Laboratory http://www.jpl.nasa.gov/. Last Visited: July, 2001

- Newton, David. Black Holes and Supernovae. New York: Twenty-First Century Books, 1996

- Ordway, Fredrick. Dividends from Space. New York: Thomas Y. Crowell Co, 1971.

- Our Solar System http://www.rochedale.powerup.com.au/solar.htm. Last Visited: July, 2001

- People In Astronomy http://www.solarviews.com/eng/people.htm. Last Visited: July, 2001

- Sagan, Carl. Cosmos. New York: Random House, 1980.

- Sagan, Carl. Mars and the Mind of Man. New York: Harper and Row, 1973.

- Shelton, William. Man's Conquest of Space. Washington, D.C.: National Geographic Society, 1968.

- Space exploration http://home.wanadoo.nl/wiedenhoff/space.HTM. Last Visited: August, 2001.

- Space Exploration: A Short History http://www.aero.org/publications/SpacePrinc/SpaceExplr.html. Last Visited: July, 2001

- SpaceRef http://spaceref.com/. Last Visited: July, 2001

- Stine, Harry. Handbook of Model Rocketry. New York: John Wiley and Sons, Inc., 1994.

- Turnill, Reginald. Observer's Space Flight Directory. London: Fredrick Warne Publishers, 1978.

- Vogt, Gregory. Apollo Moonwalks: The Amazing Lunar Missions. Springfield N.J.: Enslow Publishers, 2000

- Weingart, George. Pyrotechnics. Hollywood: Angriff Press, 1947.

- Wiech, Raymond. Fundamentals of Rocket Propulsion. New York: Reinhold Publishing Corporation, 1960.