Astronomers Detect Interstellar Sugar Molecule Erythrulose

For the first time, astronomers have directly detected a sugar molecule in the vast, cold expanse of interstellar space, a discovery that significantly advances our understanding of how the fundamental ingredients for life could be widespread throughout the cosmos. The finding, published on July 13, 2026, in the journal Nature Astronomy, centers on the detection of erythrulose, a four-carbon sugar, within a molecular cloud near the center of the Milky Way galaxy.

An international research team led by Izaskun Jiménez-Serra of Spain's Center for Astrobiology identified the sugar in a region known as G0.693-0.027, located approximately 27,000 light-years from Earth. Using ultrasensitive spectroscopic data from the 40-meter Yebes radio telescope in Spain and the 30-meter IRAM telescope in the French Alps, the scientists matched 12 distinct spectral lines to the laboratory signature of erythrulose, a compound found naturally in raspberries and used in some cosmetic products.

The discovery is pivotal because sugars are essential to all known life, forming the structural backbone of RNA and DNA and serving as key energy sources. For decades, scientists have struggled to explain how...