Earth’s 'peculiar' magnetic field is proof of how strange our solar system came to be
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The vast magnetic field that surrounds Earth distinguishes it from other planets, such as Mercury, Venus, and Mars, and is thought to be essential for its ability to support life. Produced by strong, dynamic forces at the Earth's center, the magnetic field controls the orientation of our compass needles.
Astronomers identify the "poor old heart" of the Milky Way, finding a group of stars left over from the earliest history of our galaxy.