This collection of lecture notes discusses the fundamentals of astronomy. The lecture notes review the topics of celestial mechanics, light, matter, planets, telescopes, the sun, stellar astronomy, stellar evolution,...

Housed at the Cooperative Institute for Meteorological Satellite Studies (SSEC) at the University of Wisconsin - Madison, the atmospheric emitted radiance interferometer (AERI) "measures downwelling infrared radiation...

In this activity students read about the effects of radiation on airline passengers, and discover that during a trip in a jet plane at altitudes of 30,000 feet, cosmic rays and other energetic particles pose a great...

This Web site contains a collection of information about the magnetic space environment around Earth, developed by a retired space physicist. It includes a Spanish version (MIntro.html) and one in French (incomplete),...

This activity from the Exploratorium provides a presentation of the role of the sun in ancient cultures and an extensive description of the modern view of the sun. The activity features many striking images and a...