A color-coded periodic table featured on NASA's Astronomy Picture of the Day on September 14, 2026, maps where the elements that make up human bodies and everyday objects were created. The chart assigns each known element to the most likely nuclear process that produced it, clarifying which cosmic events seeded the universe with the raw materials of life.
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The feature explains that hydrogen, the element in every water molecule and abundant in living tissue, originated in the Big Bang and has no significant alternate sources. Elements essential to biology such as carbon and oxygen were forged by nuclear fusion inside stars. Much of the iron present in people today formed later, during supernova explosions of massive stars.
The table also traces precious metals to rarer events: gold is attributed to collisions of neutron stars, cataclysmic mergers that may appear as short-duration gamma-ray bursts or as signals in gravitational wave detectors. Elements that appear in trace amounts in living organisms, like phosphorus and copper, are noted as essential despite their small concentrations. The periodic table presentation flags that the exact creation sites for some elements, copper among them, remain uncertain and are active targets for both observational campaigns and computational modelling.
APOD describes the color coding as humanity's best current assessment of each element's nuclear origin, underscoring that the map reflects ongoing scientific evaluation rather than settled fact for all entries. The page also notes an administrative change: APOD's primary NASA address is moving from apod.nasa.gov to science.nasa.gov/apod.
Credit for the September 14 entry is given to NASA GSFC's Scientific Visualization Studio. The listed authors and editors are Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti and Keighley Rockcliffe. APOD is identified as a service of the Astrophysics Science Division at NASA Goddard Space Flight Center, NASA Science Activation and Michigan Technological University. Tomorrow's featured image is titled "Sun triple."
