An illustration of a young solar system immersed in high-energy cosmic rays from a nearby supernova. Unlike considering only direct injection of supernova ejecta, this process naturally explains key ...

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In 1181 AD, a bright "guest star" was observed to linger in the sky for around six months. Nearly 850 years later, the likely remnants of this event were rediscovered and tentatively linked to the ...

For decades, planetary scientists have believed that the early solar system was enriched with short-lived radioactive elements —such as aluminum-26—by a nearby supernova. These radioactive elements ...