sub-categories:

advanced missions (4) advanced propulsion, design, projects of the future... advocacy (1) websites advocating specific mission types... comets and asteroids (3) missions to explore comets and asteroids... deep-space mapping (2) projects that will map the universe... earth (6) missions to study the earth... historical (1) sites detailing missions in the past... hubble space telescope (2) Sites specific to the Hubble Space Telescope (HST). in memorial (14) missions that ended in tragedy: Apollo 1, Challenger (51-L), Columbia (STS-107)... international space station (4) sites about the ISS...

mars (8) missions and orbiters to Mars... mir (0) sites about the Russian space station Mir... moon (16) Lunar missions... planetary (8) missions to planets... simulations (2) online sites simulating space missions... solar (3) exploration of the Sun... space shuttle (6) U.S. Space Shuttle program; the STS program... x-ray (6) research of x-ray sources...

links in this category:

SkyWatch - Your Astronomical Alarm Clock Description: Sends its subscribers a daily email on astronomical events such as satellite passes and meteor showers that can be observed from their location. Record Last Updated: 17-May-2002 | Clicks: 947

Space Archive Description: Comprehensive (unofficial) Vandenberg AFB launch schedules with e-mail alerts, information on where to view the launches and tips on photographing them. Record Last Updated: 17-Jun-2001 | Clicks: 940

Space Telescope Science Institute (STSCI) Description: Main page of the Space Telescope Science Institute, the organization in charge of the Hubble Space Telescope (HST) and Next Generation Telescope (NGT). Record Last Updated: 5-Dec-2000 | Clicks: 1033

Spaceflight Environment Description: Descriptions of the spaceflight environment, such as Shuttle g-forces, types of radiation in space, and other information. Record Last Updated: 1-Mar-2002 | Clicks: 1084

Why of Weightlessness Description: Contrary to what you might believe, there's really no such thing as weightlessness in Earth's orbit. Strictly speaking, astronauts in our orbit are really in freefall. Record Last Updated: 14-Mar-2001 | Clicks: 981

X PRIZE Foundation - Your Ticket to Space Description: The X PRIZE was founded on May 18, 1996 in St. Louis for the specific purpose of stimulating the creation of a new generation of launch vehicles designed to carry passengers into space. Record Last Updated: 4-May-2001 | Clicks: 1012

X-Prize Space Race News Description: The race to space! A special X-Prize news reporting website, because the race is heating up! Record Last Updated: 9-Apr-2004 | Clicks: 870

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