The average Hackaday reader likely knows, at least in the academic sense, what a magnetic field looks like. But as the gelatinous orbs in our skull can perceive only a tiny fraction of the EM spect… ...

Magnetic Storm homepage. When an electric current passes through a metal wire, a magnetic field forms around that wire (see diagram at right).

The diagram is not shown to scale. ESA. The Earth's magnetic field protects against solar winds that would otherwise wipe away the atmosphere from our planet, researchers announced Thursday.

A diagram of the sun’s magnetic field lines depicted over an image of the sun captured by NASA’s Solar Dynamics Observatory on March 12, 2016, when the sun’s activity was on the wane.

Mercury's magnetic field is 4 billion years old and may have once been as strong as the Earth's despite the planet's smaller size. See how a NASA probe made the find.