Who knew that magnetic fields could be so useful? Astronomers are able to use magnetic fields to map our environment within ...

When an electric current passes through a metal wire, a magnetic field forms around that wire (see diagram at right). Likewise, a wire passing through a magnetic field creates an electric current ...

Note that this magnetic field opposes the original change. For example, if a magnet is moved into a coil of wire, the induced magnetic field tends to repel the magnet back out of the coil.

Neutron star mergers are collisions between neutron stars, the collapsed cores of what were once massive supergiant stars.

Note that this magnetic field opposes the original change. For example, if a magnet is moved into a coil of wire, the induced magnetic field tends to repel the magnet back out of the coil.