Earth’s magnetic field protects us from cosmic radiation and solar wind. It serves as a shield to the ozone layer and reduces the impact of ultraviolet radiation on our planet. This dynamic force, generated by the movement of liquid iron in Earth’s outer core, undergoes periodic changes and experiences magnetic north-south flips every few hundred thousand years. Earth’s magnetic field ...
Earth’s magnetic axis, the dipole, is inclined at about 11 degrees to Earth’s spin axis. If space were a vacuum, Earth’s magnetic field would extend to infinity, getting weaker with distance, but in 1951, while studying why comet tails always point away from the sun, Ludwig Biermann discovered that the sun emits what we now call the solar ...
MSN: Parker Solar Probe data hints at a more complex solar magnetic engine
NASA’s Parker Solar Probe is forcing scientists to rethink how the Sun’s magnetic machinery actually works. A series of recent findings, drawn from the spacecraft’s closest-ever passes through the ...
Parker Solar Probe data hints at a more complex solar magnetic engine
A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets.
Magnetism, phenomenon associated with magnetic fields, which arise from the motion of electric charges. It can be an electric current in a conductor or charged particles moving through space, or it can be the motion of an electron in an atomic orbital.