A supernova may have wiped out our solar system

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Supernova explosion

When a star goes supernova in a giant explosion, it can remove matter from nearby star systems.

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A supernova explosion should be enough to wipe out almost all the dust in the solar system, and that may have happened 3 million years ago. But like dust on furniture, these fine particles will gradually replenish themselves.

The dust we see drifting through space is made up of small grains resulting from events such as asteroid collisions. The grains are generally less than a millimeter in size and can reach a few nanometers in diameter. About 70 percent of solar energy…

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