A peculiar cosmic event, dubbed EP240305a, has baffled astronomers with its rapid X-ray fade and lingering radio signals.

(Craig Taylor/iStock/Getty Images Plus) A sprinkling of radioactive plutonium atoms hidden in the ocean floor may trace back to a cosmic cataclysm more than 100 million years ago. What's more, that ...

In the heart of distant galaxies, astronomers have witnessed the most violent stellar death throes ever recorded. A massive star, several times heavier than our Sun, strays too close to the ...

Astronomers may have witnessed one of the rarest and most dramatic cosmic events ever seen: a long-sought intermediate-mass ...

Add Yahoo as a preferred source to see more of our stories on Google. After travelling 3,000 years through the galaxy, light from an exploding star will soon appear in our night sky, in what ...