NASA’s APOD Explains Cosmic Origins of Human Elements

NASA’s Astronomy Picture of the Day for September 14, 2026, traced the sources of the elements that compose the human body. It explained that the hydrogen found in every water molecule originates from the Big Bang, with no other significant cosmic source. Carbon and oxygen were forged by nuclear fusion inside stars, while iron was produced in supernova explosions long ago. Gold likely formed in neutron‑star collisions that produced short‑duration gamma‑ray bursts or gravitational‑wave events. The brief also noted that elements such as phosphorus and copper, though present in small amounts, are essential to life, yet their precise nuclear origins remain uncertain and are active research topics. Additionally, NASA announced the APOD archive will move from apod. nasa. gov to science. nasa. gov/apod.