Moon's Magnetic Field Lasted A Billion Years Longer Than We Thought

Wednesday, 9 August 2017  (1 week ago)
Watch VideoEven after dozens of missions to the moon, we're still discovering things about our nearest celestial neighbor. We knew it lost its magnetic field long ago, but astronomers just found that field lasted over 1 billion years longer than we thought.

Magnetic fields come from the rising, cooling and sinking of molten...

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