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IRAS 16293−2422
IRAS 16293–2422 is a binary system consisting of at least two forming protostars A and B, separated by a distance of 700 astronomical units (au), both having masses similar to that of the Sun. It is located in the Rho Ophiuchi star-forming region, at a distance of 140 parsecs (pc). Astronomers using the ALMA array found glycolaldehyde — a simple form of sugar — in the gas surrounding the star. This discovery was the first time sugar has been found in space around a solar-type star on scales corresponding to the distance between Sun and Uranus - i.e., the scales where a planet-forming disk is expected to arise. The discovery shows that the building blocks of life may be in the right place, at the right time, to be included in planets forming around the star. Chloromethane, also known as methyl chloride, was detected for the first time in the interstellar medium in IRAS 16293–2422. Chloromethane is an important biomarker but its discovery in a protostellar system sh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sugar Molecules In The Gas Surrounding A Young Sun-like Star
Sugar is the generic name for Sweetness, sweet-tasting, soluble carbohydrates, many of which are used in food. Simple sugars, also called monosaccharides, include glucose, fructose, and galactose. Compound sugars, also called disaccharides or double sugars, are molecules made of two Glycosidic bond, bonded monosaccharides; common examples are sucrose (glucose + fructose), lactose (glucose + galactose), and maltose (two molecules of glucose). White sugar is almost pure sucrose. In the body, compound sugars are hydrolysed into simple sugars. Longer chains of monosaccharides (>2) are not regarded as sugars and are called oligosaccharides or polysaccharides. Starch is a glucose polymer found in plants, the most abundant source of energy in human food. Some other chemical substances, such as ethylene glycol, glycerol and sugar alcohols, may have a sweet taste but are not classified as sugar. Sugars are found in the tissues of most plants. Honey and fruits are abundant natural s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
