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Chondrule from Acfer 139 meteorite

Denton S. Ebel

American Museum of Natural History

American Museum of Natural History

Meteorites—rocks that fall to Earth from space—date back to the time when our solar system was forming, about 4.5 billion years ago. By studying meteorites, we can get hints about how our planets began.

To do this, Museum meteoriticist Denton Ebel uses an electron microprobe to excite the atoms on the surfaces of meteorite samples. This produces data that reveal a sample’s mineral composition. Shown at right are four such samples: three “chondrules”—glassy spheres found in many meteorites—and one calcium-aluminum-rich inclusion, a type of rock that is the oldest material to have formed in our solar system.

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  • Title: Chondrule from Acfer 139 meteorite
  • Creator: Denton S. Ebel
  • Publisher: American Museum of Natural History
  • Department / Discipline: Earth and Planetary Science

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