Scientists may have solved the mystery of an "impossible" merger between two black holes so massive and fast-spinning that ...

Evidence suggests the universe’s expansion has started to slow, not accelerate. The results imply dark energy is weakening ...

In 2023, astronomers detected a huge collision. Two unprecedentedly massive black holes had crashed an estimated 7 billion ...

Giant stars die a violent death. After a life of several million years, they collapse into themselves and then explode in what is known as a supernova. How these stars explode remains a mystery.

(Nanowerk News) Appearing ten to a hundred times brighter at its peak, and with a much faster rise toward the peak, stellar explosions AT 2018cow (nicknamed the COW) and SN 2018gep (nicknamed the GEP) ...

Astronomers observed the fading light of supernova SN 2025kg, which followed the fast X-ray transient (FXT) named EP 250108a.

Some supernova explosions are the death throes of stars that are at least eight times more massive than our Sun. They are one of the most cataclysmic events in the Universe, unleashing as much energy ...