View Full Version : Astronomers discover "diamond planet"

Oct 11th, 2012, 11:39 PM


Move over, Hope Diamond. The most famous gems on Earth have new competition in the form of a planet made largely of diamond, astronomers say.

The alien planet, a so-called "super-Earth," is called 55 Cancri e and was discovered in 2004 around a nearby star in our Milky Way galaxy. After estimating the planet's mass and radius, and studying its host star's composition, scientists now say the rocky world is composed mainly of carbon (in the form of diamond and graphite), as well as iron, silicon carbide, and potentially silicates.

At least a third of the planet's mass is likely pure diamond.

"This is our first glimpse of a rocky world with a fundamentally different chemistry from Earth," lead researcher Nikku Madhusudhan of Yale University said in a statement. "The surface of this planet is likely covered in graphite and diamond rather than water and granite."

55 Cancri e is the first likely "diamond planet" to be identified around a sun-like star, though such worlds have been theorized before. Planets like this are vastly different from our Earth, which has relatively little carbon.

"By contrast, Earth's interior is rich in oxygen, but extremely poor in carbon -- less than a part in thousand by mass," said study co-author and Yale geophysicist Kanani Lee.

Oct 11th, 2012, 11:55 PM
I heard somewhere that in Venus rains diamonds.

Oct 12th, 2012, 12:05 AM
In enough eons, a lot of the coal in West Virginia, etc. would be naturally compressed into diamond. (The larger a planet, the greater its gravity, and thus the faster this would happen there). This is just geology, and of course carbon is ubiquitous in the universe.

Edit: of course it could later be revealed as really being Cubic Zirconium. :o

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Oct 12th, 2012, 12:09 AM
I read once that as white dwarves cool, they crystallize and their cores turn to diamond. So, around 7 billion years from now, our sun will be a giant diamond.

Pretty nice thought, really.

Sam L
Oct 12th, 2012, 11:14 AM
I remember doing a presentation at Uni on this star 55 cancri. It was one of the earliest stars to be identified with potential for Earth-like planets.

The Witch-king
Oct 12th, 2012, 11:24 AM
I heard somewhere that in Venus rains diamonds.

So many jokes here.

Oct 12th, 2012, 04:58 PM
Bodes well for mining operations. Get yoah Starlite heah!

Oct 12th, 2012, 08:29 PM
People's greediness has no bounds. Not news to me :shrug: