Astrophysics

Detection of a four-carbon sugar in interstellar space

Izaskun Jimenez-Serra, Juan Garcia de la Concepcion

Featured June 8, 2026

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Simply

Scientists discovered a four-carbon sugar floating in deep space, proving that the building blocks for life can form naturally on dust grains before planets are even born.

In depth

The paper reports the first detection of erythrulose in the interstellar medium, a chiral four-carbon ketose sugar. The authors demonstrate that this molecule forms efficiently on interstellar dust grains through the recombination of glycolaldehyde and ethylene glycol radicals, providing a potential prebiotic feedstock for early life.

Key Takeaways

1
Discovery of erythrulose in the G+0.693 molecular cloud using high-sensitivity radio telescopes.
2
Identification of a grain-surface formation mechanism involving the recombination of glycolaldehyde and ethylene glycol radicals.
3
Evidence that complex sugars can form abiotically in space, supporting the exogenous delivery hypothesis for the origin of life.

Conceptual Flow

HIGH LEVEL

Methodology

The researchers used powerful telescopes to listen for the unique radio signals of sugar molecules in a distant cloud.

Radio Telescope Data

Analyze Spectral Patterns

Molecular Identification

Results

They found that simple chemicals on tiny dust particles combine to build complex sugars.

Simple Chemicals

Surface Reaction

Complex Sugar