Montreal Planetarium
http://www.planetarium.montreal.qc.ca

Manitoba Museum of Man and Nature
http://www.manitobamuseum.mb.ca

Pacific Space Centre
http://pacific-space-centre.bc.ca

The Nine Planets
http://www.seds.org/billa/tnp/

An overview of each of the solar system’s planets and moons.

Windows to the Universe
http://www.windows.ucar.edu/

An encyclopedia of space for the beginner, intermediate, and advanced browser.

Exploratorium
http://www.exploratorium.org/learning_studio/cool/astronomy.html

Exploratorium's top astronomy sites.

A Virtual Journey Into the Universe
http://library.thinkquest.org/28327/

A tour of the solar system with pictures, text, and activities. Very cool. See the planets orbit through the site’s Flash animation.

Explains concepts such as the "birth" of a star. A section on the solar system gives planet images with fact sheets.
http://nexus.nasa.gov/

Nasa's website invites you in on the International Space Station, the science, the people, the future.
http://spaceflight.nasa.gov/

NASA's International Space Station: The official NASA web site for the International Space Station. Site includes technical information and real-time data.
http://www.boeing.com/defense-space/space/spacestation/

Boeing: Boeing, NASA's prime contractor, offers in-depth Space Station data.
http://www.hq.nasa.gov/osf/station/viewing/issvis.html

International Space Station Visibility Data: Another NASA web site devoted to the construction and launching of the International Space Station. Offers an interesting "Did You Know" section. Find out when you can see the Space Station from your city!
http://www.esa.int/export/esaCP/index.html

European Space Agency
http://www.spaceday.com/en/index.html

Games, photos, facts. This is the kid portion of the Spacewatch site.