Space Update's main website

Watch free planetarium shows online. Purchase or sign up for temporary membership to use "Space Update" software, with the applications: Astronomy, Sky Tonight, Solar System, and Space Weather. Also includes: interactive sky charts, astronomy games, and hundreds of 3D images and videos - with updated information on planets, the solar system, comets, NASA missions, the aurora, and many other astronomy subjects.

The link address is: http://www.spaceupdate.com/