Carbon Planet

A carbon planet, also referred to as a diamond planet or carbide planet, is a theoretical type of planet proposed by Marc Kuchner that could form if protoplanetary discs are carbon-rich and oxygen-poor. According to planetary science, it would develop differently from Earth, Mars and Venus, planets made up mostly of silicon–oxygen compounds. The theory has gained popularity and is now said by researchers such as Jade Bond to be built on reasonable ideas, specifically that different systems would have different ratios of carbon to oxygen, and that our own solar system's terrestrial planets actually slant toward being "oxygen planets". The unconfirmed planet PSR J1719-1438 b, discovered on August 25, 2011, as well as the planet 55 Cancri e, could be such planets.