This United States Geological Survey (USGS) fact sheet provides information on USGS professional papers, bulletins, and circulars that deal with map projections. The information includes descriptions of common projections, additions of new projections, a bibliography, software for generating project more
This site discusses the sun. Some of the topics that are touched on include: the sun's interior, the surface/atmosphere, solar activity, the fate of the sun, solar eclipses, and the myth/culture of this celestial body. Other fun information includes a solar word search game, a solar concentration ga more
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 fields that give rise to the charge motion that causes the aurora. This is part of more
This website, authored and curated by David Stern, provides an outline of the motion of charged particles in the Earth's magnetic fields, and the Van Allen and outer radiation belts. It summarizes their discovery, their properties and their physics, as well as providing links to background materials more
This site, authored by Erik Francis and hosted by Alcyone Systems, is a dictionary of physics and astronomy. Users can look up laws, rules, terms and constants related to physics in pages listed by letter. The site is not a complete reference, but it is a useful resource for introductory physics.
This web page, authored and curated by David P. Stern, provides information and a graphical exercise for students regarding the interaction between magnetic field lines and a plasma. The activity involves tracing a typical interplanetary magnetic field line, dragged out of a location on the Sun by t more
This series of web pages, authored and curated by David P. Stern, gives an elementary discussion of cosmic rays, followed by sections on high energy particles in the universe and high-energy particles from the Sun. It describes the existence particles whose velocity approaches that of light, their p more