It just keeps getting weirder...
Aug. 26th, 2011 03:02 am"Diamond" Planet Found; May Be Stripped Star
Exotic crystalline world orbits fast-spinning stellar corpse, study says
Andrew Fazekas
for National Geographic News
Published August 25, 2011
An exotic planet as dense as diamond has been found in the Milky Way, and astronomers think the world is a former star that got transformed by its orbital partner.
The odd planet was discovered orbiting what's known as a millisecond pulsar—a tiny, fast-spinning corpse of a massive star that died in a supernova.
Astronomers estimate that the newfound planet is 34,175 miles (55,000 kilometers) across, or about five times Earth's diameter.
In addition, "we are very confident it has a density about 18 times that of water," said study leader Matthew Bailes, an astronomer at the Swinburne Centre for Astrophysics & Supercomputing in Melbourne, Australia.
"This means it can't be made of gases like hydrogen and helium like most stars but [must be made of] heavier elements like carbon and oxygen, making it most likely crystalline in nature, like a diamond."
Partner Gave Pulsar a Superfast Spin
The new millisecond pulsar, dubbed PSR J1719-1438, lies about 4,000 light-years away in the southern constellation Serpens. Bailes and his team found the star during a pulsar survey using the radio telescope at Australia's Parkes Observatory.
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