2001 Mars Odyssey
2009 Mars Mission Reference
Advanced Life Support Program
A.L.I.C.E. AI Foundation
Alpha Space Group
Amazing Space
American Astronautical Society
American Institute of Aeronautics & Astronautics (Cape Canaveral Section)
Anna (Artificial Solutions AB)
Apollo Program
Apollo I Remembered
Apollo Lunar Surface Journal
The Apollo Society
Apollo: Top 10 Scientific Discoveries
The ARTEMIS Project
Assoc. of Universities for Research in Astronomy, Inc.
Astrobiology Web
Astronaut Connection
Astronomical Society of the Pacific
Astronomy Organizations On the Web
Astronomy and Space Science
Astronomy Today 2/e
Astronomy Workshop
Astronautics, Spacecraft Design and Spacecraft Systems
British Interplanetary Society 
Build a Solar System
CCSDS (Consultative Committee for Space Data Systems)
Center for Mars Exploration
Center for Orbital and Reentry Debris Studies
Center for Remote Sensing & Spacial Analysis
CERES Project
Chuck Yeager Breaks the Sound Barrier
Cosmology Poll
Deep Cold
Deep Space Reality
Delta Clipper/SSRT Program
Department of Astronomy, Cornell University
Destination: Earth
Economic Viability of Mars Colonization
Explore Mars
Eyes on the Sky, Feet on the Ground 

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FAA Foundation
Face On Mars
Failure Is Not An Option: Gene Kranz
Federation of American Scientists (FAS) Space Policy Project
Freedom of Information Act (Goddard)
Friends and Partners in Space
Heartland America: Telescope Observation Tips Guide(Submitted by Pierce)
Houston Chronicle: Space Central
Interglobal Space Lines
International Astronautical Foundation
International Dark Sky Association
International Society to Preserve the Beauty of Space
International Space Business Council
International Space Station NASA Slide Show
International Space University
Internet 1st Born
ISS Crew Return Vehicle: X-38
ISS Wall Sheet
John Glenn: Three Orbits to History
Jonathan’s Space Home Page
JPL Missions Index

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L-5 News
Leonid Meteors
Linear Aerospike SR-71
Life On Mars
Listen to the Shuttle
Living Universe Foundation
Long Range Science Rover
Lunar Prospector
Malin Space Science Systems
Manned Spacecraft: Current Locations
Mark Wade’s Encyclopaedia of Spaceflight
The Mars Academy
Mars Atlas
Mars Express
Mars Global Surveyor
Mars Exploration Program
Mars Millennium Project
Mars Society
Mars Surveyor 2001 Lander
Martian Federation
Mir and ISS
Mission & Spacecraft Library
Mission to Mars
Moon Phases
Moon Watch
Multiwavelength Messier Museum
Mysteries of Deep Space
NASA Breakthrough Propulsion Physics Project
NASA Human Spaceflight
NASA Watch (at Reston Communications)
National Air and Space Museum
National Spaceflight Training Center
The National Space Society (NSS)
The National Space Society (NSS) Chapters List
The National Space Society (Other) Web Sites
Near Earth Asteroid Rendezvous
NEAR Shoemaker Landing
New Frontier Society of Greater Rochester
New Mars
Next Generation of Space Craft
NSS Western SpacePort Chapter
Olympus Mons
The OURS Foundation

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PERMANENT Space Settlement Concepts Site
The Planetary Society
Planet Mars
The Possibilities of Colonizing Mars to Sustain Life
Project Galileo
Project Gemini
Project Q-Day 2000
Reading for the Future
Red Colony
Roadmap For the Settlement of Space
Robert Lentz’s Astronomy Resources
Roton Rollout
Rotary Rocket Company
Saturn’s Rings
Scientific Armada
SEDS (Students for the Exploration and Development of Space)
Send Your Name to Mars
The SETI League
Shuttle Press Kit
Sky Ramp Technology
Solar and Heliospheric Obervatory
Solar Sails
Space Access Society
Space Art Through the Ages
Space Coast Online
Space Day
Space Development Institute
Space Frontier Foundation
Space Science Missions
Space Settlement Initiative
Space Shuttle Challenger Remembered
Space Shuttle Challenger Transcript
Space Shuttle Flights 1981-Present
Space Telescope Science Institute
Spaceweek International Association
Star City
Starry Skies
Sun-Earth Connection
Thermal Emission Spectrometer

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UA/NASA Space Engineering Research Center
UK Space
United Space Alliance
Unmanned Space Missions
U.S. Space Camp
Views of the Solar System
Virtual Globe
Virtual Solar System
West to Mars
Wisconsin LUF Nexus
The X Prize