Raspberry Sugar Found in Space Cloud Near Milky Way Core

The same sugar found in raspberries is floating in a giant cloud of dust and gas near the heart of the Milky Way, proving that life's essential ingredients can form in the coldest corners of space.

Spanish astronomers detected erythrulose, a simple four-carbon sugar, in an interstellar dust cloud called G+0.693-0.027. This marks the first time any sugar has been directly observed in the space between stars.

Dr. Izaskun Jiménez-Serra from Spain's Centre for Astrobiology led the team that made the discovery using radio telescopes. She wasn't expecting to find anything when the signals appeared on her screen.

The sugar forms through chemical reactions on microscopic dust grains, even at temperatures around negative 250 degrees Celsius. Two other organic compounds already abundant in space, glycolaldehyde and ethylene glycol, combine on these tiny grains to create erythrulose.

This discovery helps solve a puzzle that has stumped scientists for decades. Lab studies showed that simple sugars couldn't have formed easily on young Earth, so researchers suspected they came from somewhere else.

Scientists now believe millions of tonnes of erythrulose rained down on our planet during the Late Heavy Bombardment, when asteroids and comets pummeled Earth billions of years ago. These sugar deliveries may have contributed to the prebiotic soup where the first building blocks of life formed.

The Ripple Effect

This finding opens exciting possibilities for life beyond Earth. If sugars can form naturally in space and rain down on planets, then worlds across the galaxy may receive the same chemical care packages that helped life begin here.

Simple sugars like erythrulose do more than just provide energy. They can react to form ribonucleotides, the building blocks of RNA, which scientists believe was the first genetic material before DNA evolved.

The discovery confirms earlier hints from meteorites and the Bennu asteroid, where sugars were found preserved in ancient rock. Now astronomers know these compounds are actively forming in space right now, not just leftovers from the early solar system.

Life's ingredients are being manufactured across the cosmos as you read this.