This NASA Image of the Day is the first image of the Earth and moon in a single photograph. The image was captured 7.25 million miles from Earth by Voyager 1 in 1977. More information about the photograph and a link to...

Created by Paul Falstad, this page compares the distance/magnitude/size of various objects or constants. This includes physical dimensions such as the diameter of particles, atoms and biological cells, the height of Mt....

This website, created by Lindsay Marie Bartolone at Princeton University, gives astronomy teachers labs and activities for their students that meet the requirements of the Core Curriculum Content Standards of the State...

The Abrams Planetarium, located at Michigan State University, has this homepage that describes various aspects of the outreach program created by the establishment. In addition, the page provides links to many other...

Activity-Based Physics aims to sustain and enhance efforts to render introductory physics courses more effective and exciting at both the secondary and college level. It uses the outcomes of physics education research...