Goddard Space Flight Center and Southwest Research Institute logos + View the NASA Portal

What is a magnetic field?

Magnetic fieldsA field of force that is generated by electric currents. The Sun's average large-scale magnetic field, like that of the Earth, exhibits a north and a south pole linked by lines of magnetic force. are created by things that are magnetic (like iron magnets) or by moving charged particles. A magnetic field is the description of the force a magnetic object exerts in the space surrounding the magnetic object. A force is a push or pull. To learn more about forces and magnetic fields, please visit www.colorado.edu/physics/2000/waves_particles/.

When charged particles move around really fast they create magnetic fields.

NASA Principal Investigator: Dave McComas
E/PO Lead: Lindsay Bartolone
Webmasters: Wendy Mills & Georgina Avalos
Last Updated: 22 NOVEMBER 2010
+ Contact Us