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magnetosphere

magnetosphere

5 9.9
A region around a planet where the planet's magnetic field controls small charged particles
  • noun
  • /ˈmæɡnɪtəˌsfɪr/
  • Specialized
: magnetosfera
  • Jupiter's enormous magnetosphere influences its many moons and even extends far beyond the planet itself.
  • Earth's magnetosphere
  • Jupiter's magnetosphere
  • magnetosphere traps particles

When a billion tons of solar material from Acme smashes into Earth, thankfully it is deflected by the Earth's magnetosphere.

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Examples

  • Within the magnetosphere, two concentric doughnut-shaped belts of magnetic field surround Earth.

    Academic text (2006)
  • Particles and the plasma wind connect the outer solar atmosphere primarily with Earth's magnetosphere and high-latitude upper atmosphere.

    Academic text (2006)
  • Jupiter has the largest and most energetic magnetosphere of any planet in our solar system.

    Academic text (2000)
  • Our ability to investigate Jupiter's magnetosphere up close and personal has given us a unique opportunity.

    Academic text (2000)
  • Earth's magnetic field, now called the magnetosphere, traps solar particles just above the atmosphere.

    Academic text (2000)
  • They're caused by solar particles interacting with our magnetosphere.

  • Human beings have evolved across billions of years wrapped in the comforting arms of Earth's magnetosphere.

    Fiction book (1990)
  • The Earth's magnetosphere, if you'll look to the screen, specifically the Van Allen belt, shields us from deadly solar winds and cosmic radiation.

  • In addition, both ground-based and Earth-orbiting telescopes have studied Jupiter's magnetosphere in many bands of the electromagnetic spectrum.

    Academic text (2000)
  • Earth's magnetosphere protects us from harmful solar radiation by trapping charged particles in its magnetic field.

Surface Forms

magnetosphere singular

Morphology

magnetosphere = magnet + sphere (semi-transparent) = magnet + sphere

Formally a compound of 'magnet' + 'sphere' and the parts are recognizable, but the specialized technical meaning 'the region dominated by a planet's magnetic field' requires domain knowledge of '-sphere' as 'region/layer' and is not fully derivable by an average B1 learner.

Etymology

The word magnetosphere comes from magnet and sphere, where magnet means 'magnet' and sphere means 'ball', so it is like a magnetic 'bubble' around a planet that protects it from charged particles from the Sun.