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10 billion-year-old supernova sheds new light on cosmic expansion and dark energy

A distant stellar explosion has offered astronomers a rare natural experiment, one that turns gravity into a powerful optical ...
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How rare runaway dead stars are tricky clues for a cosmic mystery

Astronomers find an explanation for the fastest stars in the galaxy while uncovering a new mechanism for a supernova explosion. Credit: Technion illustration Astronomers call a special kind of ...