This time last year, astrophiles were gearing up for a "once-in-a-lifetime" spectacle—only it never happened. The celestial event in question? The explosion of a nova star called T Coronae Borealis (T ...

Observing the Universe often means contemplating phenomena that occurred millions of years ago. But sometimes, the opportunity arises to capture a cosmic event almost in real-time, as if we were ...

This artist’s impression shows a star going supernova. About 22 million light-years away the supernova, SN 2024ggi, exploded in the galaxy NGC 3621. Using the ESO’s Very Large Telescope, astronomers ...