Are Edgeworth-Kuiper Belt objects pristine?

Article Abstract:

Researchers have cast doubt on the theory that comets have escaped the destructive forces of thermal or shock reprocessing. A computer simulation of the evolution of the comets in the Edgeworth-Kuiper Belt indicates that comets are not pristine fossils from the early solar system.

Comets

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Forging an asteroid-meteorite link

Article Abstract:

Researchers have found evidence that links the basaltic achondrite meteorite type with the main-belt asteroid 4 Vesta. The finding will help researchers develop more complete models of the formation of the solar system. Additional implications of the research are discussed.

Vesta (Asteroid), Achondrites

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To see a world in 80 kilograms of rock

Article Abstract:

The analysis of meteorites from Mars reveals much about the nature of the planet. For example, water was once plentiful on or near the Mars' surface. Several specific martian meteorites and the information they reveal about the planet are discussed.

Mars (Planet), Natural history

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