Around 500 million years ago, the inner binary would have merged, coalescing into a massive star that weighed three times our sun — much heavier than a typical star in the M67 archive. The blue ...

The blue lurker originally rotated more slowly and orbited a binary system consisting of two sun-like stars. About 500 million years ago, the two stars in that binary merged, creating a single ...

Eventually, the binary ... star systems come with more complexities and thus require detailed observations to begin unraveling their history. Sandquist is interested in seeing how prevalent blue ...