Astronomers have identified a star called PicII-503 inside the ultra-faint dwarf galaxy Pictor II, and its chemical fingerprint marks it as the first clear example of a second-generation star found in ...

For centuries, Betelgeuse — one of the brightest stars and the closest red supergiant to Earth — appeared to shine alone in the night sky, but an elusive stellar partner hiding in plain sight has ...

A mysterious cloud of ultra-hot dust around Kappa Tucanae A may finally have an explanation: a hidden companion star. The star’s extreme orbit carries it straight through the dust zone, strongly ...