Two astronomers think they’ve pinpointed the ancient stellar collision that gave our solar system its cache of precious gold and platinum — some of it, anyway.In a new study published May 1 in the journal Nature, the duo analyzed the remnants of radioactive isotopes, or versions of molecules with different numbers of neutrons, in a very old meteorite. Then, they compared those values with isotope ratios produced by a computer simulation of neutron star mergers — cataclysmic stellar collisions that can cause ripples in the fabric of space-time. [15 Unforgettable Images of Stars]The researchers found that a single neutron star collision, starting about 100 million years before our solar system formed and located 1,000 light-years away, may have provided our cosmic neighborhood many of the

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