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Obliteration asteroid

Credit: JPL-Caltech
The dust on the surfaces of small asteroids is a result of extreme temperature shifts between periods of sunlight and darkness — a cycle of drastic changes…Read More »

that break up space rocks over time, scientists say.

Asteroids rotate like the Earth does, creating temperature fluctuations as their sides change from day to night, the researchers explained in a new study. On the smaller surfaces, these changes can be sufficient to crack and break apart the outer edges of the rocky bodies.

[Full Story: For Small Asteroids, Sunlight Spawns Dust (and Maybe Death)]   Less «
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