Tag: cosmic history
-
Pacific Be-10 Spike Suggests Nearby Ancient Supernova
Overview: A surprising isotopic signal in Pacific sediments Scientists have identified an unusual spike in the radioactive isotope beryllium-10 (Be-10) in ocean sediments from the Pacific Ocean. Because Be-10 forms when cosmic rays strike Earth’s atmosphere, such a spike can act as a cosmic fingerprint, potentially recording a nearby stellar explosion in Earth’s distant past.…
-
A Single, ‘Naked’ Black Hole Rewrites the History of the Universe
Introduction to the Discovery In an extraordinary discovery, astronomers have identified a black hole that defies conventional understanding—a solitary, massive, ‘naked’ black hole situated in the early universe. This approximately 1.5 billion solar masses black hole stands as a testament to the universe’s enigmatic origins and offers a fresh perspective on its formation. What is…