Why an interstellar comet has scientists excited
toggle caption NASA/European Space Agency/via AP
An ancient comet that entered our solar system this summer is offering a rare opportunity to learn more about distant planetary systems far beyond the reach of any spacecraft, researchers say.
The comet is special both because it is interstellar — meaning it came from outside our solar system — and also because nickel vapor was detected in the gas surrounding the comet.
This comet, called 3I/ATLAS, is only the third such interstellar object to enter our
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