The Apollo samples, “formed at ∼3.9, 3.6, 3.3, and 3.2 billion years ago,” don’t show any evidence of core dynamo activity—the telltale behavior indicating the presence of a magnetic field.

Flowing metal in Earth's core makes the heart of the planet a dynamo — a generator of electrical current — and this dynamo generates Earth's magnetic field. Get the Space.com Newsletter ...

ALBUQUERQUE, N.M., June 3, 2002 - Researchers at the U.S. Department of Energy's Los Alamos National Laboratory believe that magnetic field lines extending a few million light years from galaxies ...

Within an existing magnetic field, a dynamo acts as an electrical generator to induce an electrical current in the flowing iron. This action produces its own magnetism, which strengthens and ...

Some bike lights use a type of dc generator called a dynamo close dynamo An electrical generator which produces direct ... The coil is moving at 90° to the direction of the magnetic field, ...

Or perhaps there is no need for the presence of a dynamo-driven magnetic field at all. For instance, the authors of a 2021 study thought earlier analyses of lunar samples may have been altered ...

Related: Earliest magnetic galaxy ever detected offers clues about Milky Way history But that just pushes the goalpost back even further. Where do the weak seed fields come from in the first place ...

Between 1831 and 1832, Michael Faraday discovered that a potential difference is generated between the ends of an electrical conductor that moves perpendicular to a magnetic field.

Rock samples collected from the moon's far side by China's Chang'e-6 lunar probe indicate an unexpected resurgence in the moon's magnetic field strength 2.8 billion years ago, which challenges the ...

Representation of Earth’s Invisible Magnetic Field. Britannica. Electric generator. The cosmic dynamo: proceedings of the 157th Symposium of the International Astronomical Union held in Potsdam. The ...

Acting as a spinning conductor in a bicycle dynamo, it creates electrical currents, which in turn, generate our continuously changing electromagnetic field.” Strength of the magnetic field at ...

Researchers at the U.S. Department of Energy’s Los Alamos National Laboratory believe that magnetic field lines extending a few million light years from galaxies into space may be the result of ...