Sugar molecules have been found in the gas surrounding a young sun-like star, suggesting that some of the building blocks of life may actually be present even as alien planets are still forming in the system. The young star, called IRAS 16293-2422, is part of a binary (or two-star) system. It has a similar mass to the sun and is located about 400 light-years away in the constellation of Ophiuchus.

The sugar molecules, known as glycolaldehyde, have previously been detected in interstellar space, but according to the researchers, this is the first time they have been spotted so close to a sun-like star. Glycolaldehyde can react with a substance called propenal to form ribose, which is a major component of RNA, or ribonucleic acid. RNA is similar to DNA, which is considered one of the primary molecules in the origin of life.

Astronomers found the sugar molecules using the Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope in Chile. Using ALMA, the astronomers monitored the sugar molecules and found that they are falling toward one of the stars in the binary system. When new stars are formed, the clouds of dust and gas from which they are born are extremely cold. Much of the gas turns into ice on the dust particles, bonding together and becoming complex molecules, the researchers said.

As the newborn star develops, it heats up the inner parts of the rotating cloud of gas and dust, warming it to about room temperature, the scientists explained. This heating process evaporates the chemically complex molecules and forms gases that emit radiation that can be picked up by sensitive radio telescopes.

Since IRAS 16293-2422 is located relatively close to Earth, scientists will be able to study the molecular and chemical makeup of the gas and dust around the young star. Powerful instruments, including ALMA, will also help researchers see the interactions of these molecules as new alien planets form. The detailed results of the study will be published in an upcoming issue of the Astrophysical Journal Letters.

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