- Astronomy Picture of the Day Gorgeous photos with great explanations and links to more info.
- NASA’s main site with links to a tremendous number of interesting photos and space mission results.
- Tonight’s Sky Check out what’s visible in the sky tonight.
- Bad Astronomy amusingly debunks many misconceptions (though it’s somewhat commercial).
- Pulsar Sounds where you can “hear” the radio signals of several pulsars recorded by large radio telescopes.
