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Astronomers' Dark Energy Hopes Fade to Gray

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Remnant of Type 1A supernova

A remnant from a Type 1A supernova observed in the Milky Way, one of the cosmic markers of how fast the universe is expanding. Observing exploding stars helped astronomers first discover the existence of dark energy nearly 20 years ago.

Credit: Chandra X-ray Observatory/NASA

A star-crossed mission nearly 20 years in the making that was intended to seek an answer to the most burning, baffling question in astronomy—and perhaps elucidate the fate of the universe—is in danger of being canceled.

From The New York Times
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