A strange radio signal reveals an exoplanet with a magnetic field like Earth’s

It is the first magnetosphere on a planet beyond the Solar System, one of the necessary conditions for life

In the illustration, the interactions between the exoplanet YZ Ceti by its star National Science Foundation/Alice Kitterman

Here in our world, the magnetic field is a natural shield, protecting us from radiation reaching us from space, especially from the Sun. Without this natural defense, solar particles would have worn away our atmosphere long ago, so …

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