Cosmic Collisions Forge Precious Metals

Got story updates? Submit your updates here. ›

Billions of light years away, a collision between two neutron stars - the dense remnants of dead stars - produced a powerful gamma-ray burst that traveled for 8.5 billion years before reaching Earth. Astrophysicists have now linked this cosmic event to a merger between two galaxies, revealing a new pathway for the formation and spread of heavy elements like gold and platinum across the universe.

Why it matters

Neutron star mergers are the most powerful explosions in the universe, releasing as much energy as our Sun will produce over its entire lifetime in just seconds. These collisions can forge new radioactive elements, including valuable metals like gold and platinum. Tracing the origins of this particular gamma-ray burst to a collision between galaxies offers new insights into how these heavy elements are distributed throughout the cosmos.

The details

Using NASA's Chandra X-ray Observatory and the Hubble Space Telescope, the researchers pinpointed the location of the gamma-ray burst, known as GRB 230906A, to a faint, dwarf galaxy formed from material stripped away during a past galactic collision. This is the first time a binary neutron star merger has been linked to such an environment, revealing new potential homes for these cosmic events beyond just large galaxies.

• The gamma-ray signal from the neutron star collision traveled for 8.5 billion years before reaching Earth.

What they’re saying

What’s next

New powerful observatories like the James Webb Space Telescope and the Nancy Grace Roman Space Telescope will enable the discovery and detailed study of distant mergers responsible for producing heavy elements. Future advanced X-ray missions and the next generation of gravitational wave detectors will also be essential for understanding how the elements that make up our world are formed.