A diamond planet?

Distant, carbon-rich world could contain one-third its weight in gems that are relatively rare on Earth

By Sid Perkins, 15:37 PM November 30, 2012

A planet orbiting a distant star is probably unlike any of the hundreds yet discovered. Scientists say that about one-third of this incredibly hot, barren world — larger than Earth — could be made from diamonds.

The planet, known as 55 Cancri e, is one of five circling the star 55 Cancri. This star lies about 40 light-years from Earth. A light-year is the distance that light travels in one year, about 9.5 trillion kilometers. The distant solar system lies within the constellation Cancer. ...

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