Magnetars are neutron stars with magnetic fields 300 trillion times stronger than Earth's, capable of stripping iron from blood at half the distance to the moon; in 2004, a magnetar flare from SGR 1806-20 partially ionized Earth's atmosphere from 50,000 light-years away, demonstrating their extreme influence across vast cosmic distances.
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The Star That Would Strip Your Blood.Added:
The most magnetic object in the universe is the size of a city.
It would strip [music] the iron from your blood at half the distance to the moon.
A magnetar flare in 2004 partially ionized Earth's atmosphere from 50,000 light-years away.
We don't know how many are closer.
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