Astronomy and Space

A Diamond of a Discovery

Planet 55 cancri e is one large diamond

Strangely reminiscent of the Planet Midnight in the BBC television program Doctor Who, this real life diamond planet orbits a star in the constellation Cancer. Composed largely of carbon, the surface temperature of 1,700 Celsius (3,100 Fahrenheit). Its large mass and extreme conditions are ideal for creating diamonds.  

Doctor Who Diamond Planet Midnight
The diamond planet Midnight from Doctor Who.

More than just produce diamonds, the planet goes one better by being a massive diamond, in and of itself. At twice the size of earth, the fair market value of this enormous stone is estimated to be $26.9 nonillion (269, followed by 29 zeros). 

With Earth’s total gross domestic product estimated at $70 trillion in 2011, the value of 55 Canceri e is 384 quadrillion times more than our planet’s combined GDP.


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