GAIA: The Galactic Census Project
- A European Space Agency astrometry satellite mission designed to determine the composition, formation and evolution of our Galaxy, and create a detailed 3D map of over a billion stars.
- http://www.rssd.esa.int/index.php?project=GAIA

Space Interferometry Mission
- Scheduled for launch in 2006, the SIM will determine the positions and distances of stars several hundred times more accurately than any previous program. Information on the SIM and its technology.
- http://planetquest.jpl.nasa.gov/SIM/sim_index.cfm

The Suzaku Learning Center
- Suzaku (formerly Astro-E2) is a satellite launched on July 10, 2005 for studying X-rays emitted by stars, galaxies, and black holes. Includes news, science primer, details about the instruments, educational resources, and data.
- http://heasarc.gsfc.nasa.gov/docs/astroe_lc/

CYGAM
- Offers description and data on a gamma-ray telescope flown on several space missions.
- http://www.iki.rssi.ru/cygam/english/contents.htm

Interball
- Provides overview of Russion participation in a mission studying plasma processes with several spacecraft at the L1/L2 Sun/Earth libration points.
- http://www.iki.rssi.ru/interball/

INTEGRAL
- Russian Science Data Center, providing basic overview of science mission.
- http://hea.iki.rssi.ru/integral/

Wide-field Infrared Survey Explorer (WISE)
- Offers project and scientific information on a coming infrared observatory mission to observe stars and galaxies.
- http://wise.ssl.berkeley.edu/

USGS Astrogeology Research Program
- Features planetary imagery, research, GIS, mapping, and image processing software. Offers data from a variety of space mission.
- http://astrogeology.usgs.gov/

XMM-Newton
- The European Space Agency's XMM satellite official home page. News updates and multimedia.
- http://xmm.vilspa.esa.es/

Solar System Exploration: Missions
- Browsable information on dozens of interplanetary NASA programs. Includes links to official mission homepages.
- http://sse.jpl.nasa.gov/missions/

A History of Unmanned Space Missions
- Chronological listings of unmanned missions from 1957-2004. Includes dates and mission highlights.
- http://www.windows.ucar.edu/cgi-bin/tour_def/space_missions/unmanned_table.html

Infrared Space Observatory
- Provides background material and results from the European Space Agency's Infrared Telescope, ISO, as well information for users of the facility.
- http://isowww.estec.esa.nl/

The Wide Field Infrared Explorer (WIRE)
- A spaceborne, cryogenically-cooled imaging telescope designed to explore the evolution of starburst galaxies and to search for protogalaxies.
- http://www.ipac.caltech.edu/wire/

RXTE Mission
- Rossi X-Ray Timing Explorer is a Goddard mission which was launched on December 30th, 1995. RXTE is designed to facilitate the study of time variability in the emission of X-ray sources with moderate spectral resolution.
- http://heasarc.gsfc.nasa.gov/docs/xte/XTE.html

High Energy Missions
- NASA guide to the scientific equipment and research aboard high-energy astrophysics missions.
- http://astroe.gsfc.nasa.gov/docs/heasarc/missions/alphabet.html

International Sun-Earth Explorers
- Spacecraft and mission profiles from the National Space Science Data Center.
- http://nssdc.gsfc.nasa.gov/space/isee.html

Canberra Deep Space Communications Complex
- One of the three Deep Space Network stations, CDSCC provides critical communications and tracking information to interplanetary space probes.
- http://www.cdscc.nasa.gov/

The New Millennium Program
- NASA's low-cost, experimental spacecraft program. Includes the "Deep Space" missions.
- http://nmp.jpl.nasa.gov/

Space Science Missions of the European Space Agency
- Information and data on those of ESA's past, present, and future satellite missions related to astronomy and astrophysics.
- http://sci.esa.int/