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Murchison meteorite4/8/2023 ![]() At the time, it was a huge leap in scientific understanding with regard to the synthesis of complex molecules in space.Ĭhirality refers to the one-handedness of a molecule: If you flip a chiral molecule over, it won’t look the same, just like a hand. The initial finding of propylene oxide in Sagittarius B2 was important, since it is one of the most complex molecules found in space and the first to exhibit chirality. Pizzarello and Yarnes tested the meteorite for propylene oxide, an organic molecule that was previously found in Sagittarius B2, a dust cloud near the center of the Milky Way. Yarnes’ research focuses on compound-specific stable isotope analysis. More recently her work has also focused on mimicking the prebiotic catalytic activity and reactions of these compounds. Pizzarello’s research includes the study of organic matter in carbonaceous chondrite meteorites, with a focus on the molecular, isotopic and chiral characterization of compounds within the meteorites. Sandra Pizzarello, a former professor in the School of Molecular Sciences at Arizona State University (ASU), and Christopher Yarnes, an assistant research engineer from the University of California, Davis (UCD), recently studied extracts from the Murchison asteroid. ![]() Over 70 different amino acids, as well as 14,000 molecular compounds, have been identified on the Murchison meteorite.Īt over 100 kilograms, the organic-compound-rich meteorite is still being used today to understand space and organic material. Its chemical makeup suggests that it was formed within the early solar system, when dust clouds were forming into small asteroids, and that it was never heated past its melting point. The meteorite, which fell in 1969 in Australia, is classified as a carbonaceous chondrite meteorite. One particular space object, the Murchison meteorite, has been a valuable specimen to scientists. This organic matter has been found as far away as the center of the Milky Way and as close as our planetary neighbor Mars. Amino acids and organic molecules have been discovered throughout all corners of space. Previous work into organic material in space has proven plentiful. Scientists have begun to look at space as the first home for life, especially at meteorites, which have the unique capability to transfer molecules between galaxies. Later on, the deep-sea vent theory suggested that life began deep in the ocean, where the heat from underwater vents met the molecule-rich floor sediment to create biotic material. The Miller-Urey experiment showed that organic compounds can be formed from matter in Earth’s early atmosphere by electrical stimuli, such as lightning.Īlexander Graham Cairns-Smith further hypothesized that organic molecules first met in a clay matrix, giving the molecules the support and organization to create complex organic molecules. Numerous experiments have recreated the environment of the early Earth and determined that biological molecules could have first formed on our planet. As the only known planet with life, it makes sense to assume that life began on Earth.
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