Friday, December 24, 2010

SPACE DEBRIS

SPACE DEBRIS
millions of objects, remnants of planetary formation,circles the sun in a zone lying between mars and jupiter : the asteroid belt.fragments of asteroid break off to form meteoroids,which can reach earths surface. Comets, composed of ice and dust ,originated outside solar sysem .their elliptibal orbit brings them closer to sun and into the inner solar system.

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