How dense is the atmosphere between 100 km and geosynch orbit at 36,000 km?
• Are there places on the WWW that give aurora forecasts? • When the Earth’s magnetic field reverses, does its rotation also switch? • What is the average density of solar wind particles that produce the aurora? • Are auroras seen on other planets? • Can you hear an aurora? • How often are aurorae seen in the continental United States? • What are some of the early theories about auroras? • How long have auroras been observed? • Is there a greater risk for solar radiation when taking the polar route by jet plane? • Is plasma present during an aurora? • Is it true that organic matter cannot pass through the van Allen radiation belts? • Did the Earth gain a new van Allen radiation belt in 1998? • Where is the biggest difference between true north and magnetic north? • What is the strongest magnetic field ever known? • Do animals really use magnetism in any interesting way to navigate? • Do magnets loose their magnetism in space when they are outside the earth’s magnetosphere? • Is there a
