• http://hubblesite.org                                               Hubble Space Telescope 
• www.nasa.gov                                                        NASA
• www.aiaa.org                                                         American Institute of Aeronautics and Astronautics
• http://planetary.org                                               The Planetary Society
• http://kepler.nasa.gov                                           Kepler Mission: Search for Habitable Planets
• www.jpl.nasa.gov                                                  JPL Propulsion Lab
• www.eofcosmos.org                                              Encyclopedia of the Cosmos
• www.seds.org                                                        Students for Exploration & Development of Space
• www.seti.org                                                         SETI Institute
• www.spaceweather.com                                       Space Weather
• www.obspm.fr/encycl.encycl.html                        Extrasolar Planets Encyclopedia
• http://eaae-astro.org                                           European Associacion for Astronomy Educ.
• www.grc.nasa.gov/WWW/bpp                             NASA Breakthrough Propulsion Physics
• www.nasa.gov/centers/glenn/research/warp/warp.html                 Warp Drive, When?
• www.nasa.gov/mission_pages/constellation/main/index.html          How we will get back to the Moon
•  

Put your name on board the Kepler spacecraft. Your name will be stored on a DVD and Kepler will carry it into space. Name in Space is an activity in association with the International Year of Astronomy 2009.                         http://namesinspace.seti.org/

Astra's Stargate (a cool website by NASA astronomer Dawn Jenkins)

This site is packed with interesting information about astronomy, space exploration, women in astronomy and science, and Maya astronomy. I strongly recommend to visit Dawn's page

http://www.astras-stargate.com/mayastro.htm