A year after its launch, NASA’s SPHEREx observatory has provided a new perspective on the chemical scaffolding of the Milky Way. In a recently released study of Cygnus X—a turbulent cradle of star formation—the mission identified the distinct signatures of water ice and complex organic molecules. These findings represent a significant step in the observatory’s primary goal: cataloging the distribution of interstellar ice across the galaxy.
Unlike traditional telescopes that capture broad visual spectra, SPHEREx (the Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer) operates in 102 distinct infrared wavelengths. This granular approach allows researchers to identify the specific chemical fingerprints of water, carbon dioxide, and carbon monoxide. These substances do not exist as free-floating droplets in the void; instead, they cling to the surfaces of microscopic dust grains, forming the reservoirs where the vast majority of the universe’s water is synthesized and stored.
The implications of this mapping extend beyond mere celestial cartography. The ice observed in regions like Cygnus X is the ancestral material for the water found in comets, on distant moons, and within Earth’s own oceans. By tracing these frozen molecules back to their origins in the interstellar medium, astronomers are effectively reading the prologue to the history of life in our solar system.
With reporting from NASA Breaking News.
Source · NASA Breaking News
