How rare runaway dead stars are tricky clues for a cosmic mystery

2 months ago 4

An artist's rendering of two white dwarfs colliding before the surviving one is ejected.

Astronomers call a special kind of supernova a "cosmic yardstick" for good reason: The so-called Type Ia supernova gives off a predictable amount of light, making it a handy tool for measuring distances in space.

These particular supernovas are useful but still puzzling, with scientists still unsure of what triggers their blasts. Source: https://mashable.com/article/high-velocity-white-dwarfs-supernova-origins

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