Here we employ multiwavelength observations to demonstrate that one such region, Ophiuchus, containing many prestellar cores that may serve as analogues for the emerging Solar System 2, is inundated with 26Al from the neighbouring Upper Scorpius association 3, and so may provide concrete guidance for how short-lived radionuclide enrichment proceeded in the Solar System, complementary to the meteoritics. γ-rays from one such living short-lived radionuclide, 26Al, are detected in only a few nearby star-forming regions. Anomalies among the daughter nuclei of the extinct short-lived radionuclides in calcium–aluminium-rich inclusions indicate that the Solar System must have been born near a source of the short-lived radionuclides so that they could be incorporated before they decayed away 1.
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