Students practice skills used in scientific investigation while studying the three main types of galaxies. Students identify Earth as part of Milky Way galaxy, the parts of galaxies, and the types of galaxies, as well as classify...

NOVA provides a report on comet Hale-Bopp and comet Hyakutake. Content includes discovery and observational information.

The expansion and explosion of a star is described at it goes through its nova phase. Current theories are discussed.

Pictures and descriptions of the robot spacecraft that have explored the planets and outer space since the 1960s.

This site provides information about the Hubble Space Telescope, and its mission into space.