An algebra-based overview of elementary and pre-telescope astronomy. Topics covered include sundials, seasons, calendars, precession, shape and rotation of Earth, Greek astronomy, the path to heliocentric theory and...

This website, authored by Ricky Leon Murphy of Astronomy Online, is a collection of references, images, and information for general astronomy. This work covers topics from the basics of science and observation through...

"Where did everything come from?" This is a big question, so it is only fitting that the answer is found in the Big History Project. This free online course, designed for high school students, takes learners on a journey...

The Contemporary Physics Education Project (CPEP) is a non-profit organization comprised of leading physicists and outstanding teachers and educators. CPEP charts, software, and educational materials have gained...

This PDF document consists of lesson plans and an activity which is composed of a three-part questionnaire that launches students on discussions about where objects in space are located, and when they were formed- an...