Zero Gravity Corporation is a privately held space entertainment and tourism company headquartered in Fort Lauderdale, Florida. The company's first product offering is commercial, Weightless Flights aboard a specially modified Boeing 727-200 aircraft. ZERO-G is the only company approved by the FAA to conduct Weightless Flights for the public. These are the same type of flights used by NASA to train their astronauts and used by Ron Howard in the filming of Apollo 13. ZERO-G's mission is to make the excitement and adventure of space accessible to the public in a safe, fun, and cost-effective fashion.

AirLaunch LLC Developer of the QuickReach TM vehicle for affordable space lift.

Kistler Aerospace Corporation "...is embarking on a historic journey to create the world's first fully reusable aerospace vehicles. Our goal is to become a delivery service to low earth orbit that will radically realign the economics of doing business in space. Satellites will be our parcels; our vehicles will be operated in repeated flights with air freight efficiency. In essence, we are creating the "UPS" of space." 2 stage, partially reusable system.

Microcosm, Inc. "Scorpius is a family of low-cost launch vehicles under development whose goal is to reduce the cost of access to space by a factor of 10!" Recent successful launch attempt from White Sands!

Rocketplane Limited, Inc. Rocketplane Ltd., Inc. has obtained tax credits from the state of Oklahoma to develop a re-usable sub-orbital tourist business at the Oklahoma Spaceport. In addition to the XP, Rocketplane is developing future space vehicle programs that will have a high return on investment. We will achieve these goals by designing and building state-of-the-art reusable spacecraft, providing unparalleled human training and spaceflight experiences, and transporting innovative scientific experiments and valuable payloads to sub-orbital space and beyond.

SpaceX, Inc. ...is developing a family of launch vehicles intended to substantially reduce the cost of reliable access to space. The company officially began operations in June 2002 and is located in the heart of the aerospace industry in Southern California, about a mile from LAX.

X Rocket, LLC is a spaceflight services company. Our goal is to make commercial human spaceflight safe, routine, and affordable by offering training and education to industry, government, and the general public. Innovation begins at the low end. At X-Rocket, we specialize in suborbital vehicles that can be developed cheaply, put into service quickly, and operated at low cost. We believe that low-cost suborbital vehicles will revolution the space industry, the same way low-cost microcomputers revolutionized the computer industry.

Virgin Galactic A company established by Richard Branson's Virgin Group to undertake the challenge of developing space tourism for everybody. Virgin Galactic will own and operate privately built spaceships, modeled on the history-making SpaceShipOne craft. These spaceships will allow affordable sub-orbital space tourism for the first time in our history.

Transformational Space Corporation Opening space to frontier settlement and development requires breakthroughs in lower costs and higher safety. The t/Space team is working toward these goals by combining the rapid-prototyping approach of its innovative aerospace partners with the in-space experience of key personnel drawn from the White House, NASA and large aerospace companies. t/Space was formed in 2004 to respond to NASA's plans to implement the President's Vision for Space Exploration. The company was one of eight winners in NASA's "Concept Exploration and Refinement" competition to advise the agency on the best architecture for Moon-Mars exploration and the best initial design for the Crew Exploration Vehicle (CEV). The effort kicked off in August 2004 with a $3 million contract that was extended in March 2005 with another $3 million.

TransOrbital is the only private company to be authorized by the U.S. State Department and NOAA for commercial  flights to the Moon. The TrailBlazer lunar orbiter will be the first delivery service to the Moon. Delivered to the Moon surface in a special capsule will be your certificates, business cards, cremated  remains, jewelry, artwork and many other items of choice. The TrailBlazer satellite will deliver commercial and scientific projects and experiments to lunar orbit, as well as conduct lunar exploration and mapping.

SpaceDev (OTCBB: SPDV) creates and sells affordable and innovative space products and solutions to government and commercial enterprises. SpaceDev products and solutions include the design, manufacture, marketing and operation of sophisticated micro and nano satellites, hybrid rocket-based orbital Maneuvering and orbital Transfer Vehicles (MoTVs) as well as safe sub-orbital and orbital hybrid rocket-based propulsion systems.

Lunar Resources Company The corporate arm of the Artemis Society, planning a commercial lunar base.

Armadillo Aerospace is a small research and development team working on computer-controlled hydrogen peroxide rocket vehicles, with an eye towards manned suborbital vehicle development in the coming years. The team currently consists of a bunch of guys, a girl, and an armadillo named Widget. Our fearless leader, John Carmack, will lead us to space and, well, outer space. Please feel free to make yourselves at home and check out our journey.

Blue Origin is developing vehicles and technologies that, over time, will help enable an enduring human presence in space. Our initial research efforts are focused on reusable liquid propulsion systems, low cost operations, life support, abort systems and human factors. We are currently working to develop a crewed, suborbital launch system that emphasizes safety and low cost of operations.

E'Prime Aerospace Corporation The Eagle family of launch vehicles combines the proven technology of solid rocket manufacturing with updated state-of-the-art electronics and light weight materials. In addition, Eaglet, Eagle, S-I and S-II will be operated under cold launch conditions. Whereby, the rocket is propelled roughly 200 feet into the air, at which time, the first stage is ignited.

Garvey Spacecraft Corporation A small aerospace R&D company focusing on cost-effective development of advanced space technologies and launch vehicle systems.

JP Aerospace A volunteer-based organization dedicated to achieving cheap access to space by building and flying VERY low cost, innovative systems.

Kelly Space and Technology An engineering, design, and technology development company incorporated in April 1993 under the laws of the State of California for the purpose of developing a family of low cost, reusable, commercial sub-orbital and orbital launch vehicles.

Lunar Rocket & Rover Co., Inc. was founded in 2002 by LRRC President Robert Kleinberger with the intention of bringing access to space and space exploration within the reach of industry and education institutions.

Masten Space Systems is working to create inexpensive access to space by incrementally developing a series of launch vehicles with the reusability and reliability of airplanes. The key to this approach is creating a technology base that is both scalable and flexible. We believe that vertical take-off and landing (VTOL) is the only way to get the salability and flexibility to quickly and inexpensively develop the appropriate vehicles for all phases of space flight, from the eXtreme Altitude (XA) line of sub-orbital vehicles progressing to staged orbital launch vehicles and planetary exploration vehicles.

Orion Propulsion, Inc. Whether you are searching for a partner to test your latest motor or for a company to help you research and design the next generation of propulsion systems, Orion Propulsion has the experience and knowledge to get the job done. Located just outside the "Rocket City" of Huntsville, Alabama, Orion is strategically positioned to tap the technical resources and heritage of some of America's greatest successful propulsion achievements. Steeped in areospace history yet on the forefront of space commercialization, Orion Propulsion is the perfect partner for your propulsion project.

Space Launch Corporation was formed to develop and bring to market innovative products for the space transportation industry. We are located in Irvine, California, in the heart of southern California's aerospace community. We are focused primarily on the design, development, and testing of launch system technologies for the micro satellite market. We combine technical innovation and a well developed understanding of the market's requirements to provide our customers with compelling products and solutions at the lowest possible cost.

TGV Rockets is an innovative start-up company pioneering a unique new class of reusable, low cost, piloted sub-orbital rocket. TGV Rockets will market vehicles and services to industry, researchers, military organizations and interested individuals. We intend to dominate the high altitude and sub-orbital research operations market, providing high value to customers and investors.

TO SPACE sends items into space and returns them intact and unchanged. The types of items we can fly are limited only by your imagination. We utilize a class of launchers that has been flying for decades

The Space Frontier Foundation is an organization of people dedicated to opening the Space Frontier to human settlement as rapidly as possible. Our goals include protecting the Earth's fragile biosphere and creating a freer and more prosperous life for each generation by using the unlimited energy and material resources of space. Our purpose is to unleash the power of free enterprise and lead a united humanity permanently into the Solar System.

The Heinlein Society Dedicated to the vision of Robert A. Heinlein, The Heinlein Society is an educational non-profit organization founded by Virginia Heinlein to “pay forward” her husband's legacy of pro-space activism.

The Mars Society

The Moon Society An international non-profit educational and scientific foundation formed to further scientific study and development of the Moon.

The National Space Society (NSS)

The Planetary Society

ProSpace A legislative affairs and lobbying organization which takes the message of opening the space frontier to Capitol Hill. Among their activities is the annual March Storm, a week-long event where citizens tell their elected representatives what THEY want America's space policy to be.

SEDS (Students for the Exploration and Development of Space)

SEDS UK

SSI (Space Studies Institute)

The Suborbital Institute An organization concerned with legislation and regulatory issues affecting commercial suborbital spaceflight.

Yuri's Night An annual celebration of Yuri Gagarin's historic flight.

Dale Gray's Frontier File Hosted by Interglobal Space Lines.

NASA Watch Updated daily by Reston Communications

Space.com

SpaceDaily.com

Space Policy Digest Has suspended publication, but offers an extensive archive of articles.

The Space Show Hosted by Dr. David Livingston, The Space Show focuses on timely and important issues influencing the development of outer-space commerce and space tourism.

AMSAT The Radio Amateur Satellite Corporation.

The Archimedes Institute Focusing on International Space Law.

The ARTEMIS Project A private venture to establish a permanent, self-supporting community on the Moon.

Celestrak Current orbital elements.

Federation of Amercian Scientists (FAS) Space Policy Project

The First Millennial Foundation The Living Universe Foundation seeks to preserve the ecology of the Earth while colonizing the oceans and outer space.

HobbySpace.com Resources for space hobbies and activities for the general public.

Interglobal Space Lines

International Space University (ISU)

PERMANENT Space Settlement Concepts

The SETI League The international grass-roots organization dedicated to privatizing the electromagnetic Search for Extra-Terrestrial Intelligence.

The Space Settlement Initiative A site by Alan Wasser which proposes legislation regarding space property rights that would help Open the Frontier.

Spaceweek International Association

Visual Satellite Observer's Home Page

Energia Ltd.

Russian Aerospace Guide Edited by Dennis Newkirk.

China Academy of Launch Vehicle Technology (CALT) Long March Launch Vehicle site.

AdvanceSpace

Apogee Books "The" space book company, publishers of the NASA Mission Reports.Astro Sociology Understanding space and society from a grounded perspective.

Apogee Rockets Rocketry For Educators: this extensive site provides useful information about using model rockets in classrooms.

Encyclopedia Astronautica A fine site by Mark Wade, endorsed by Encyclopedia Britanica, NASA, and the New York and London Times.

Nigel Hey's Solar System Site for the book Solar System by science writer Nigel Hey, published in October 2002 and containing contributions by Pascal Lee, Sir Arthur C. Clarke and Freeman Dyson.

International Spacecraft and Launch Vehicle Names Glossary A searchable database, listing more than 6000 names and designations.

Jonathan's Space Home Page Includes Annual Launch Log and Condensed UN Registry of Space Objects.

Spacelawstation A site of resources relating to civil and commercial space law.

Space Tethers This site explores Single Stage To Tether – Airlaunch-Rocket-Tether technology and includes a Space Tethers Simulator with a Rocket Equation Applet.

Sven Grahn's Space Place A Swedish site on space history, radio tracking and technology.

Spacewarn (Launch Announcements)

Space Calendar Maintained by Ron Baalke at JPL.

Great Aviation Quotes – Space Extensive space quotes from Dave English's Skygod.com.

Space Quotes What famous people (and some not famous) have said about why humankind must expand into space: To survive, To preserve Earth, To eliminate war, To grow, Time is running out..., To evolve, ...To achieve the goal visionaries have foreseen.

Quent Cordair Fine Art Quent Cordair Fine Art features several works by space artists, such as Bryan Larsen's "Heroes", which was featured at an X-COR function at Mojave Spaceport, Sylvia Bokor's "Ascent of Man" and "Tomorrow Today", and the work of Brian Smith, who's specialty is space related pastel paintings.

One Planet One Planet, One People, One Universe.

Earth Exploration Rover Mission A site by Robert Zimmerman which parodies JPL's Mars Exploration Rover Mission site.

Klyde Morris Wes Oleszewski, pilot and artist, has produced his syndicated Klyde Morris comic strip for over 25 years. The strip takes a humorous looks at NASA, the FAA and aerospace politics.

Spacetopia Japan's first space travel company.

Space Adventures, Inc. "Through Space Adventures and its partners, hundreds of people have traveled past the speed of sound; thousands have ventured to the Arctic and Antarctica, and millions have experienced exotic locales around the world. Now we're ready to take you out of this world!"

Orbital Commerce Project is developing the premier crew training program for suborbital flight.

MirCorp The Netherlands-based MirCorp brings Western financial support and management expertise together with Russia's unmatched experience in the operation of manned orbital space stations. International investors have committed funding for commercial operations in space, first on Mir and now with Mini Station 1 – the new privately run commercial orbital facility currently under development by MirCorp.

Interglobal Space Lines, Inc. "This is your one-stop shop for space tourist experiences! We are currently offering weightless trips to the general public in the United States. If you don't want to experience free fall right now, feel free to check out our plans for future offerings."

Environmental Tectonics Corporation (Amex: ETC) ("ETC") has been the world leader in aeromedical training for more than thirty-five years. Our pioneering technologies have created training solutions for the most rigorous stresses encountered during high performance aircraft flight including the effects of altitude exposure, high G exposure, Spatial Disorientation, and escape from a disabled aircraft. This experience uniquely qualifies ETC to provide solutions for travel into the next frontier...space.

United Start Corporation A privately held Delaware corporation, majority U.S. owned – with minority Russian ownership by the company ZAO Puskovie Uslugi. United Start has been in existence since 1998 and provides marketing and end-to-end services on selected Russian launch vehicles.

COSMOS International GmbH COSMOS is the world's most successful two stage liquid propellant space transportation system for small to medium payloads up to 1500 kg into low earth orbits. COSMOS was effective in 97.4% of its more than 740 launches.

EUROROCKET Launch Services GmbH EUROCKOT is a joint venture company founded by DaimlerChrysler Aerospace (Dasa) of Germany holding 51% and Khrunichev State Research and Production Space Center (Khrunichev) of Russia holding 49%.

Kosmotras Established in 1997 for development and commercial operation of the Dnepr Space Launch System based on SS-18 ICBM technology.

International Launch Services Sells Protons and Angara.

SeaLaunch Co. "Sea Launch Co., LDC, the U.S.-based multi-national commercial satellite launching venture led by Boeing, continues its march toward a first lift-off in June 1998 from its unique ocean-going launch complex in June 1998." Will use Ukrainian built Zenit rockets. First test – March, 1999!

Starsem Markets the venerable Soyuz launcher.

Aero Astro founded in 1988, changes the way space is used to get results right here on Earth. AeroAstro has brought satellite costs down so significantly that many applications never even considered are now practical.

AstroVision In 2008, AstroVision Australia Limited intends to deliver the first live, continuous true color image stream of the Earth. Publicly traded in Australia – ASX: HZG

Bigelow Aerospace General Contractor providing design, engineering, and assembly of space complexes.

Constellation Services International, Inc. Logistics for orbital platforms.

California Spaceport The facility is designed as a cost-effective solution for military / government, civilian, academic and commercial needs. Located on Vandenberg Air Force Base, the Spaceport provides turnkey services for a wide variety of satellite and booster requirements.

Orbital Recovery Corporation is developing a unique new concept to extend the useful life of multi-million dollar telecommunications satellites by 10 years or more.

Tether Applications Developing space tethers for use in aerospace environments.

Tethers Unlimited is an aerospace R&D company developing long life and high strength space tether technology such as the Hoytether, the Terminator Tether, and Tether Transport Systems. A space tether is a long cable used to couple spacecraft to each other or to other masses, such as a spent booster rocket, space station, or an asteroid.

Universal Space Network, Inc. USN is an innovative company, founded by aerospace pioneer Charles "Pete" Conrad, Jr., which has built a ground network of tracking stations to provide "cost-effective" space operations and telemetry, tracking and control (TT&C) services to support "earth-orbiting" assets. The USN team consists of industry professionals with broad aerospace experience, ensuring that customers receive the highest quality technical expertise and customer service available.

XCOR Aerospace, Inc. is a company dedicated to commercial rockets. XCOR Aerospace develops reusable rocket engines and complete rocket vehicles for private and government markets. They are currently flying the EZ-Rocket, a manned reusable rocket aircraft which has demonstrated two flights in one day.