Participate in science

  • SciStarter - an index of science projects in which anyone can participate
  • Galaxy Zoo - help to classify galaxies
  • Planet Hunters - search for planets around other stars
  • Zooniverse - more astronomy classification projects
  • BOINC - volunteer your computer power for science
  • theSkyNet - use your spare computing power to analyse radio astronomy data

General open resources

  • Wikipedia
  • Wikibooks
  • open culture - a collection of the best free cultural & educational media on the web, also with lists of links to educational resources
  • Scholarpedia - a peer-reviewed open-access encyclopedia written by scholars

Lectures online

Documentaries online