For more than a century, engineers have chased new ways to turn the planet’s natural motions into usable power, from tides to ...

A magnetometer is a device that measures magnetism: the direction, strength, or relative change of a magnetic field at a ...

Magnetic fields play an important—if sometimes underappreciated—part in planetary systems. Without a strong magnetic field, planets can end up as a barren wasteland like Mars, or they could indirectly ...