Ancient Dust Found in Meteorites Came From Exploding Stars

Microscopic dust grains extracted from meteorites that landed on Earth had ancient and explosive origins, scientists have discovered. The dust grains — also known as presolar grains, since they're older than Earth's sun — were likely spewed out by stars that blew up hundreds of millions of years before Earth's solar system formed. And in a new analysis of data collected from these tiny particles, researchers have come closer to pinpointing the type of stellar blast that produced the dust, 5 billion years ago.

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