Spanish Researchers Discover Space Sugars, Potential Origin of Life

Astronomers have detected the molecular fingerprint of erythrulose—a sugar molecule found in raspberries and self-tanning products—within the G+0.693−0.027 gas cloud near the center of the Milky Way. Researchers from the Spanish Center for Astrobiology identified the molecule using high-sensitivity radiotelescopes in Guadalajara and Granada, according to their study published in Nature Astronomy.

The Search for Life’s Building Blocks

The detection of erythrulose, a four-carbon sugar, provides a significant update to our understanding of prebiotic chemistry. While previous missions, such as NASA’s OSIRIS-REx mission to asteroid Bennu in 2020, confirmed the presence of sugars in space, scientists have struggled to identify specific molecules that could facilitate the creation of RNA. According to the Spanish research team, erythrulose can serve as a precursor to ribonucleotides, the essential building blocks for genetic material.

Why Four-Carbon Sugars Are the Key

The discovery explains why previous attempts to locate life-essential sugars in interstellar clouds were often unsuccessful. Michiel Hogerheijde, a senior lecturer in astronomy at Leiden University who was not involved in the study, notes that researchers had previously focused on three-carbon sugars. The latest findings demonstrate that four-carbon sugars like erythrulose are significantly more stable than sugars with only three carbon atoms.

“It is plausible that impacts on the young Earth from asteroids or meteorites, carrying their supply of sugars, could have given the emergence of life a nudge in the right direction,” says Hogerheijde. This suggests that the “fingerprint” identified by the Spanish team could be the missing link in how prebiotic ingredients migrated from deep space to early planetary surfaces.

The Panspermia Hypothesis Gains Ground

The presence of organic molecules in deep space supports the theory that the ingredients necessary for life are widespread throughout the universe. In 2023, the discovery of the amino acid tryptophan in a star-forming cloud further bolstered the idea that organic building blocks could “rain down” on young planets. This latest data from the G+0.693−0.027 cloud suggests that the chemical foundation for life may be a universal constant rather than a rare terrestrial fluke.

Pro Tips for Tracking Space Chemistry

• Analyze Spectral Data: Astronomers use specific radiotelescope wavelengths to identify the unique “fingerprints” of complex molecules.

Frequently Asked Questions

Is the erythrulose found in space the same as in food?

Yes, it is the same molecular structure. It is a four-carbon sugar found naturally in raspberries and used commercially in cosmetics.

How did astronomers find it 27,000 light-years away?

Researchers utilized highly sensitive radiotelescopes in Spain to detect the specific electromagnetic wavelength (the “fingerprint”) emitted by the molecule within a dense gas cloud.

Does this prove there is life in space?

No. This confirms that the building blocks for life are present in the interstellar medium, which increases the probability that these materials could support the development of life on other planets.

What do you think about the origins of life? Does the prospect of “cosmic ingredients” change your view on the possibility of life elsewhere in the galaxy? Share your thoughts in the comments below or subscribe to our newsletter for the latest updates in space science.