In this video adapted from NASA, learn how scientists study planetary magnetic fields. Animations illustrate how iron filings and a compass can show what a magnetic field looks like around a bar magnet. Find out how a magnetometer can be used like a compass to determine what a planet's magnetic field looks like. Learn how an electromagnet works, and how a magnetometer onboard a satellite measures a planetary magnetic field.
This video is available in both English and Spanish with closed captions.