Astronomers detect sugar molecule erythrulose in interstellar space

Astronomers have detected erythrulose, a four-carbon sugar molecule, within the interstellar medium—the thin clouds of gas and dust that drift between stars. The discovery, reported in the journal Nature, marks the first time a true sugar has been spotted in interstellar space.

The molecule is not just a cosmic curiosity; it is a substance found on Earth in self-tanners and raspberries. While erythrulose itself is not essential for life, researchers note that it can easily convert into a form thought to be crucial for kick-starting life on Earth. According to NBC News, the discovery provides evidence for the theory that the essential components for life were already present in the galaxy before the solar system formed, rather than being delivered later by space rocks or comets.

Related imagery

Methodology and Location

To find the sugar, researchers used two dish-shaped radio telescopes located in Spain, including a telescope at the Yebes Observatory, as reported by 1news. The team collected data from a massive gas cloud situated near the center of the Milky Way. They were able to identify the sugar in gas form by comparing the signals received by the telescopes with samples analyzed in a laboratory setting.

The region where the sugar was detected has also been crossed by NASA's twin Voyager spacecraft, the farthest human-made objects to travel from Earth. This discovery adds to a growing list of complex chemistry found in the galactic center, where astronomers spotted a cousin to table sugar approximately 25 years ago.

Significance for Astrobiology

Sugars are fundamental building blocks of life; various types fuel cells and comprise DNA. Because of this, scientists are focused on how these molecules form in the vacuum of space. Erika Hamden, an astrophysicist with the University of Arizona who was not involved in the research, described the discovery as a pristine example of the stuff that’s just floating out in the galaxy, according to ABC News. Hamden further noted that erythrulose is among the most complex sugars detected in space to date.

The implications extend beyond the Milky Way. Izaskun Jiménez-Serra, an astrophysicist at the Center for Astrobiology in Spain and author of the study, suggests that the presence of these molecules in one location implies they are likely hidden in other distant corners of the galaxy.

"The key ingredients for the origin of life could be present in other regions across the galaxy, opening the possibility for life to develop elsewhere in the universe,"

Izaskun Jiménez-Serra, astrophysicist at the Center for Astrobiology, via NBC News

Cosmic Sugar Timeline and Context

• Approximately 25 years ago: Astronomers detect a cousin of table sugar near the center of the Milky Way.
• Recent Years: NASA’s Osiris-Rex spacecraft retrieves black grains from asteroid Bennu, which yield sugars including a key ingredient for DNA.
• Research published in Nature Astronomy announcing the detection of the four-carbon sugar erythrulose in the interstellar medium.

And the search does not end here. Researchers now intend to hunt for additional sugars in space and investigate the specific mechanisms by which these molecules convert into different forms.