Life in the Universe

Life on Earth and on the Moon

Why is Earth’s magnetic field important to life on Earth?

Earth’s magnetic field extends out into space, creating a structure called a magnetosphere, which surrounds our planet. When the magnetosphere is hit by charged particles from space, such as from the solar wind or from a coronal mass ejection, it deflects these particles away from Earth’s surface, significantly reducing the amount that strikes life forms down on Earth’s surface. This protects us from the hazards of being hit by too many such particles.


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