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  2. Dynamo theory - Wikipedia

    en.wikipedia.org/wiki/Dynamo_theory

    The most functional feature of kinematic dynamo theory is that it can be used to test whether a velocity field is or is not capable of dynamo action. By experimentally applying a certain velocity field to a small magnetic field, one can observe whether the magnetic field tends to grow (or not) in response to the applied flow.

  3. Solar dynamo - Wikipedia

    en.wikipedia.org/wiki/Solar_dynamo

    The solar dynamo is a physical process that generates the Sun's magnetic field.It is explained with a variant of the dynamo theory.A naturally occurring electric generator in the Sun's interior produces electric currents and a magnetic field, following the laws of Ampère, Faraday and Ohm, as well as the laws of fluid dynamics, which together form the laws of magnetohydrodynamics.

  4. Earth's magnetic field - Wikipedia

    en.wikipedia.org/wiki/Earth's_magnetic_field

    A dynamo can amplify a magnetic field, but it needs a "seed" field to get it started. [59] For the Earth, this could have been an external magnetic field. Early in its history the Sun went through a T-Tauri phase in which the solar wind would have had a magnetic field orders of magnitude larger than the present solar wind. [60]

  5. Magnetosphere - Wikipedia

    en.wikipedia.org/wiki/Magnetosphere

    Farther out, field lines can be significantly distorted by the flow of electrically conducting plasma, as emitted from the Sun (i.e., the solar wind) or a nearby star. [ 3 ] [ 4 ] Planets having active magnetospheres, like the Earth, are capable of mitigating or blocking the effects of solar radiation or cosmic radiation .

  6. Stellar magnetic field - Wikipedia

    en.wikipedia.org/wiki/Stellar_magnetic_field

    The coolest of these, 2MASS J10475385+2124234 with a temperature of 800-900 K, retains a magnetic field stronger than 1.7 kG, making it some 3000 times stronger than the Earth's magnetic field. [18] Radio observations also suggest that their magnetic fields periodically change their orientation, similar to the Sun during the solar cycle .

  7. Solar phenomena - Wikipedia

    en.wikipedia.org/wiki/Solar_phenomena

    These particles can escape the Sun's gravity because of their high energy. The solar wind is divided into the slow solar wind and the fast solar wind. The slow solar wind has a velocity of about 400 kilometres per second (250 mi/s), a temperature of 2 × 10 5 K and a composition that is a close match to the corona.

  8. Magnetic field of the Moon - Wikipedia

    en.wikipedia.org/wiki/Magnetic_field_of_the_Moon

    Total magnetic field strength at the surface of the Moon as derived from the Lunar Prospector electron reflectometer experiment. The magnetic field of the Moon is very weak in comparison to that of the Earth; the major difference is the Moon does not have a dipolar magnetic field currently (as would be generated by a geodynamo in its core), so that the magnetization present is varied (see ...

  9. Sun - Wikipedia

    en.wikipedia.org/wiki/Sun

    The Sun has a stellar magnetic field that varies across its surface. Its polar field is 1–2 gauss (0.0001–0.0002 T), whereas the field is typically 3,000 gauss (0.3 T) in features on the Sun called sunspots and 10–100 gauss (0.001–0.01 T) in solar prominences. [5] The magnetic field varies in time and location.