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Cosmic connections: NASA's Fermi spots first-ever evidence of a sibling supernova

Two stars that once lived together in the Jellyfish Nebula may have also died together. Massive stars often form and live as pairs, and when one runs out of nuclear fuel, it collapses and explodes in a supernova. But while models have long predicted this dual-demise, astronomers had never found observational proof that both stars in a s... [4058 chars]

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