• Together these two winds produce a shield that allows certain types of matter in the outer regions of the accretion disk area to sail away safely, said the scientists from the Goddard center.

    CNN: Black holes in a new light

  • The Sun's magnetic field and solar wind - mainly in the form of electrons and protons coming out of the Sun - protects the entire Solar System by acting as a sort of shield from cosmic rays (very energetic particles and radiation from outer space).

    BBC: Viewpoint: The Sun and climate change

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