Check out this National Aeronautics and Space Administration site for information about the two objects found by the Hubble that are apparently orbiting Pluto. You can see images of these objects and find out their...

At NOVA's Origins website, users can "journey back to the beginning of everything: the universe, Earth, and life itself." The web site offers a series of interactive modules where visitors can decide if life exists on...

This website from NASA is a photo gallery that contains images of planets, nebulae, galaxies, globular clusters, stars, compact objects, and spacecraft.

This set of twelve lesson plans is intended to encourage the teaching of astronomy to K-12 students. The lessons are designed to make use of a planetarium projector, but they can be modified for use with different...

Authored and curated by David P. Stern, these pages explore orbits and the "Lagrangian points", where objects will orbit the sun with the same period as the earth. This has applications for solar monitoring spacecraft....