Open and Zero-cost Resources

Freely Accessible Planetariums

  • Google Sky
    “Using Google Maps this tool provides an exciting way to browse and explore the universe. You can find the positions of the planets and constellations on the sky and even watching the birth of distant galaxies as seen by the Hubble Space Telescope.”
  • Stellarium Web
    Stellarium Web is “an online planetarium running in your web browser based on the open source Stellarium Web Engine project.”
  • SkyGazer
    “View the sky from any place on Earth or in the Solar System, over a timespan of ten thousand years from the present.” Create sky charts and historic sky simulations, display realistic planet graphics and eclipses, and illustrate such concepts as the seasons of the year, among other possible demonstrations.