{"id":37277,"date":"2025-01-29T18:41:05","date_gmt":"2025-01-29T17:41:05","guid":{"rendered":"https:\/\/karmaka.de\/?p=37277"},"modified":"2025-01-29T18:44:51","modified_gmt":"2025-01-29T17:44:51","slug":"abundant-ammonia-and-nitrogen-rich-soluble-organic-matter-in-samples-from-asteroid-101955-bennu","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=37277","title":{"rendered":"Abundant ammonia and nitrogen-rich soluble organic matter in samples from asteroid (101955) Bennu<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Daniel P. Glavin, Jason P. Dworkin, Conel M. O\u2019D. Alexander, Jos\u00e9 C. Aponte, Allison A. Baczynski, Jessica J. Barnes, Hans A. Bechtel, Eve L. Berger, Aaron S. Burton, Paola Caselli, Angela H. Chung, Simon J. Clemett, George D. Cody, Gerardo Dominguez, Jamie E. Elsila, Kendra K. Farnsworth, Dionysis I. Foustoukos, Katherine H. Freeman, Yoshihiro Furukawa, Zack Gainsforth, Heather V. Graham, Tommaso Grassi, Barbara Michela Giuliano, Victoria E. Hamilton, \u2026Dante S. Lauretta<\/p>\n\n\n\n<p>Nature Astronomy, Published: 29 January 2025<\/p>\n\n\n\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41550-024-02472-9\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.nature.com\/articles\/s41550-024-02472-9.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Organic matter in meteorites reveals clues about early Solar System chemistry and the origin of molecules important to life, but terrestrial exposure complicates interpretation. Samples returned from the B-type asteroid Bennu by the Origins, Spectral Interpretation, Resource Identification, and Security\u2013Regolith Explorer mission enabled us to study pristine carbonaceous astromaterial without uncontrolled exposure to Earth\u2019s biosphere. Here we show that Bennu samples are volatile rich, with more carbon, nitrogen and ammonia than samples from asteroid Ryugu and most meteorites. Nitrogen-15 isotopic enrichments indicate that ammonia and other N-containing soluble molecules formed in a cold molecular cloud or the outer protoplanetary disk. We detected amino acids (including 14 of the 20 used in terrestrial biology), amines, formaldehyde, carboxylic acids, polycyclic aromatic hydrocarbons and N-heterocycles (including all five nucleobases found in DNA and RNA), along with ~10,000 N-bearing chemical species. All chiral non-protein amino acids were racemic or nearly so, implying that terrestrial life\u2019s left-handed chirality may not be due to bias in prebiotic molecules delivered by impacts. The relative abundances of amino acids and other soluble organics suggest formation and alteration by low-temperature reactions, possibly in NH3-rich fluids. Bennu\u2019s parent asteroid developed in or accreted ices from a reservoir in the outer Solar System where ammonia ice was stable.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Daniel P. Glavin, Jason P. Dworkin, Conel M. O\u2019D. Alexander, Jos\u00e9 C. Aponte, Allison A. Baczynski, Jessica J. Barnes, Hans A. Bechtel, Eve L. Berger, Aaron S. Burton, Paola Caselli, Angela H. Chung, Simon J&#8230;.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[152,576,552,181],"tags":[5719,542,5022,1865,2242,1854,4844,3459,622,1989,2673,4899,4323],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/37277"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=37277"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/37277\/revisions"}],"predecessor-version":[{"id":37278,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/37277\/revisions\/37278"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=37277"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=37277"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=37277"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}