Cassini unlocks the secrets of how the Sun’s immense magnetic field covers the Solar System

The Sun’s magnetic field stretches 23 billion miles from our star, encircling all the planets in the Solar System and much more beyond.

Made of solar wind, charged particles released from the surface of the star, this field protects the Solar system from harmful cosmic rays.

For years, it had been thought the shape of this heliosphere was a comet-like tail stretching out from the Sun, like many other stars in our galaxy. A new study shows this might not be the case.

Read more on WIRED

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