X rays reveal Eros’ primitive nature
By Ron Cowen
Aided by a blast of X rays from the sun, a spacecraft orbiting the near-Earth asteroid 433 Eros has gathered preliminary evidence that the rock is apparently unchanged since the birth of the solar system.
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The finding supports the notion that Eros and other S asteroids, the most common class in the solar system, are the parent bodies of ordinary chondrites, the most common class of meteorites that fall to Earth.