Carbon (gray), oxygen (red), and hydrogen (white) sugar molecules are seen in an artist's impression.
Image courtesy L. Calçada, ESO/NOAJ/NRAO
The simple sugar molecules were found in the Rho Ophiuchi star-forming region. Image courtesy WISE/Caltech/NASA
Published August 29, 2012
Astronomers have made a sweet discovery: simple sugar molecules floating in the gas around a star some 400 light-years away, suggesting the possibility of life on other planets.
The discovery doesn't prove that life has developed elsewhere in the universe—but it implies that there is no reason it could not. It shows that the carbon-rich molecules that are the building blocks of life can be present even before planets have begun forming.
Scientists use the term "sugar" to loosely refer to organic molecules known as carbohydrates, which are made up of carbon, hydrogen, and oxygen.
The molecules that the team detected in space are the simplest form of sugar, called glycoaldehyde, explained lead astronomer Jes Jørgensen of Denmark's Copenhagen University.
Glycoaldehyde can be found on Earth, usually in the form of an odorless white powder. While it isn't used to sweeten foods, it is important because scientists think it plays a key role in the chemical reaction that forms ribonucleic acid (RNA), a crucial biomolecule present in all living cells.
It's still unclear exactly how glycoaldehyde is produced in space, but observations suggest it forms on ice-covered dust grains in the dense, cold parts of interstellar molecular clouds, Jørgensen said.
(See "Star Found Shooting Water 'Bullets.'")
Sugary Find a First in Space
This marks the first time sugar has been spotted so close to a sunlike star.
Previously, glycoaldehyde had been found in only two other places in space: near the center of the giant cloud of gas and dust at the heart of our own Milky Way galaxy, and in a massive star-forming region located 26,000 light-years from Earth.
"Both of these regions are much further away and were observed with much worse resolution, [so] it was not possible for the astronomers to pinpoint the location of the molecules," Jørgensen said.
(Also see "Life on Mars Found by NASA's Viking Mission?")
The new discovery, which focused on the warm gas swaddling a young star called IRAS 16293-2422, was made using the Atacama Large Millimeter Array (ALMA), a large radio telescope located in Chile.
"These results are giving us and other astronomers ammunition," Jørgensen said, "to go out and look for other prebiotic, and possibly more complex, molecules in regions where stars and planets are forming."
Latest News
Trending News
-
Rare Video of Giant Oarfish
Scientists recently captured a rare video of an oarfish, but what's the real significance of the underwater footage?
-
5 Sky Events This Week
Skywatchers can witness the biggest supermoon of 2013 and several other lunar events this week.
-
Environmental Murder Mystery
Police are still looking for environmentalist Jairo Mora Sandoval's murderers, while the episode has more Costa Ricans talking about the links between poaching and drug trafficking.
Advertisement
Celebrating 125 Years
-
Explorer Moment: Ray of Hope
Biologist Andrea Marshall leads her team in discovering new and conserving known manta ray species.
-
Sylvia Earle on Women in Science
Sylvia Earle reflects on her scientific career and on gender obstacles she faced along the way.
ScienceBlogs Picks
Connect With Nat Geo
Got Something to Share?
Special Ad Section
Great Energy Challenge Blog
- Study Says: Hey, You, Get Onto the Cloud (It Saves Energy)
- Who Will Swelter This Summer? The Pressures on the Nation’s Power Grid
- Tar Sands Tour: Boomtown, Scarecrows, and Spin; “We Have Met the Enemy, and He is Us”
- Climate Change: China, U.S. Bring Toy Fire Truck to Seven-Alarm Fire
- Student Infographic Contest Paints Bright Picture of Youth Concern on Energy and Climate
