US EditionDouble-Star Discovery Suggests There's a New Nearby Supernova Progenitor
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Double-Star Discovery Suggests There's a New Nearby Supernova Progenitor
New data suggest that the second-brightest star in the constellation Sagittarius is not one star but two. The two stars will someday merge to form a single star with a mass of 12 solar masses, and at just 228 light-years away, the resulting star will be the nearest core-collapse supernova progenitor to Earth. One Star of Two? The star Sigma Sagittarii, formally named Nunki by the International Astronomical Union, has been under scrutiny for deca…
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