A double blast of dying stars may be the first observed case of a long-hypothesized, never proven “superkilonova.” Although ...

The new candidate, AT2025ulz, initially acted like a kilonova, only to later mystify scientists by morphing into what ...

Columbia Professor Brian Metzger helped other astronomers interpret their observations of the unexpected stellar event.

When the most massive stars reach the ends of their lives, they blow up in spectacular supernova explosions, which seed the ...

Collision of Two Neutron Stars Billions of Years Ago Made Enough Gold and Uranium To Fill Earth's Oceans, Says Study Billions of years ago, deep down in the cosmos, two neutron stars began their ...

Primordial nucleosynthesis during the early universe generated hydrogen, helium, and minor lithium-7 before the cosmos cooled, halting further fusion. Stellar interiors synthesize elements up to iron ...

Neutron stars are ultra-dense star remnants made up primarily of nucleons (i.e., protons and neutrons). Over the course of ...

Artist’s impression of the powerful winds blowing from the bright X-ray source GX13+1. The X-rays are coming from a disc of hot matter, known as an accretion disc, that is gradually spiralling down to ...