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Neptune: Is It a Girl’s Best Friend?

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Experiments performed by Laura Robin Benedetti and colleagues at the University of California in Berkeley agreed with theories that the intense pressures and temperatures in the interiors of planets such as Neptune convert methane into diamond -- with one difference. The research group simulated these forces on methane, which may constitute 10 to 15 percent of Neptune's mass, and found that it dissociated at much lower pressures than the 300 GPa that had been theorized. The researchers used laser-heated diamond anvil cells to compress liquid methane at pressures of 10 to 50 GPa (100,000...Read full article

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