Amazing Space is a great website for teachers and students of astronomy. Amazing Space has a great collection of virtual tours and online simulations. Each simulation contains valuable lessons about an astronomy topic. The screen shot to the left is the start page of a comet exploration tour.
Applications for Education
The educator resource page on Amazing Space is full of great ideas and lesson plans for teaching astronomy to students in elementary school, middle school, and high school. For each virtual tour and online simulation there are suggested lesson activities. The educator page includes a host of reproducible graphic organizers and reading materials.