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The compound marks the first time a true sugar molecule has been directly identified in interstellar space
While erythrulose is not a direct component of modern biological systems, it is a highly reactive compound that can easily convert into other sugars critical to early Earth chemistry. Representational image
Astronomers have discovered a type of natural sugar commonly found in raspberries floating within a massive cloud of interstellar gas and dust. Located roughly 26,700 light-years away near the dense, chaotic centre of the Milky Way, the compound marks the first time a true sugar molecule has been directly identified in interstellar space.
The molecule, known as erythrulose, is a four-carbon sugar that occurs in trace amounts in red fruits and is widely used on Earth as an ingredient in self-tanning lotions. Its detection in the freezing expanse between stars suggests that the sophisticated chemical building blocks required for life can develop long before stars and planets even begin to form.
The Chemistry of the Interstellar Medium
The discovery was made inside a giant molecular cloud known to astronomers as G+0.693-0.027. This region acts as a vast cosmic chemical laboratory, containing a wide variety of complex organic molecules. Researchers identified the sugar by deploying two high-powered radio telescopes in Spain to capture the distinct radio frequencies emitted as the molecules rotate in space.
The data revealed that erythrulose was between 8 and 17 times more abundant in the cloud than simpler three-carbon sugars, which were entirely absent. Astrophysicists believe the sugar forms at temperatures as low as -250°C when simpler carbon-based compounds, such as glycolaldehyde and ethylene glycol, freeze onto the surfaces of microscopic cosmic dust grains and chemically bond over vast periods.
Implications for the Origins of Life
While erythrulose is not a direct component of modern biological systems, it is a highly reactive compound that can easily convert into other sugars critical to early Earth chemistry. Simple sugars are vital for life, serving as primary energy sources and forming the structural scaffolding for genetic material.
- Prebiotic Soup: The discovery supports theories that a torrent of comets and asteroids showered the early Earth with space-born organic material during its violent formative years.
- RNA Precursors: Erythrulose can react to form ribonucleotides, the foundational units of RNA, which scientists believe was the planet’s first genetic material before DNA evolved.
- Chiral Complexity: The sugar is only the second “chiral” molecule found in interstellar space—meaning it exists in left- and right-handed mirrors, a defining trait of biological structures.
Finding these critical ingredients drifting in the deep interstellar medium indicates that the fundamental chemistry for life is likely widespread across the universe, waiting to be incorporated into newly forming planetary systems.
The discovery of the sugar molecule erythrulose in interstellar space supports theories that organic material from space may have contributed to the early Earth’s chemical building blocks for life.
About the Author
Pathikrit Sen Gupta is a Senior Associate Editor with News18.com and likes to cut a long story short. He writes sporadically on Politics, Sports, Global Affairs, Space, Entertainment, And Food. He tra…Read More
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