Scientists have finally solved a two-decade-old mystery about how some of the universe’s most valuable elements—including gold—are created.
In a new breakthrough study, researchers have clarified the nuclear processes responsible for forming heavy elements during some of the most violent cosmic events known.
The discovery helps explain how gold and similar elements are forged in space before eventually becoming part of planets like Earth.
For years, physicists have known that elements heavier than iron cannot be produced in the normal life cycle of stars. Instead, they are formed through a phenomenon known as the rapid neutron-capture process, or r-process.
This process occurs when atomic nuclei absorb neutrons extremely quickly, building heavier and heavier elements.
However, the precise nuclear reactions that allow this process to occur had remained unclear for more than 20 years.
The new research has provided critical measurements and improved models of these nuclear reactions, helping scientists better understand how heavy elements are assembled in extreme astrophysical environments.
Researchers say these conditions most commonly occur during the collision of neutron stars—ultra-dense remnants of massive stars that have exploded as supernovae.
When two neutron stars merge, they unleash enormous energy and eject neutron-rich material into space. Within seconds, this material undergoes the rapid neutron-capture process, producing elements such as gold, platinum, and uranium.
The findings help resolve long-standing questions in nuclear astrophysics and improve scientists’ ability to simulate how elements are formed across the universe.
The gold found on Earth today was likely created billions of years ago during such cosmic explosions.
After forming in distant stellar collisions, the newly forged elements were scattered across space, eventually becoming part of the gas and dust clouds that formed our solar system.
Researchers say the new results mark a significant step forward in understanding the origins of the universe’s heaviest elements—and reveal more about the cosmic events that produced the gold we value on Earth today.
