These web pages, authored and curated by David Stern, provide an introduction to the aurora and the physical mechanisms that cause it. They include details about auroral imaging, particularly from satellites, and the...

The Idaho State University Department of Physics conducts science demonstration shows at S. E. Idaho schools. Four different presentations are currently available; "Forces and Motion", "States of Matter", "Electricity...

First of several linked files, telling the early history of the compass (discovered in China) and how Robert Norman in 1581 showed the magnetic force was not horizontal but slanted downwards, followed by William...

These pages, authored and curated by David P. Stern, describe a dynamo process that creates the magnetic fields of the Earth and the Sun. Flows of electrically conducting material through existing magnetic fields...

This web site is a basic, non-mathematical introduction to relativity. It covers concepts from Galileo, Newton, and Maxwell through Einstein and special relativity. The site also mentions modern topics such as the...