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Abundant ammonia and nitrogen-rich soluble organic matter in samples from asteroid (101955) Bennu.
Nat. Astron. 9:20 (2025)
Verlagsversion
Forschungsdaten
DOI
PMC
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–Regolith Explorer mission enabled us to study pristine carbonaceous astromaterial without uncontrolled exposure to Earth’s 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’s 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’s parent asteroid developed in or accreted ices from a reservoir in the outer Solar System where ammonia ice was stable.
Impact Factor
Scopus SNIP
Altmetric
14.300
2.578
Anmerkungen
Besondere Publikation
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Asteroids, Comets And Kuiper Belt ; Astrobiology; Amino-acids; Parent Body; Evolution; Origin; Carbon
Sprache
englisch
Veröffentlichungsjahr
2025
HGF-Berichtsjahr
2025
ISSN (print) / ISBN
2397-3366
e-ISSN
2397-3366
Zeitschrift
Nature Astronomy
Quellenangaben
Band: 9,
Heft: 2,
Artikelnummer: 20
Verlag
Springer
Verlagsort
Heidelberger Platz 3, Berlin, 14197, Germany
Begutachtungsstatus
Peer reviewed
POF Topic(s)
30202 - Environmental Health
Forschungsfeld(er)
Environmental Sciences
PSP-Element(e)
G-504800-001
Förderungen
U.S. DOE Office of Science User Facility
German Research Foundation
Office of Science, Office of Basic Energy Sciences, of the US Department of Energy
NASA OSIRIS-REx Sample Analysis Participating Scientist Program (ORSA-PSP) award
Japan Society for the Promotion of Science under KAKENHI
NASA
University of Maryland, Baltimore County
Center for Research and Exploration in Space Science and Technology II cooperative agreement with NASA
TAWANI Foundation
Emerging Worlds
NASA | Goddard Space Flight Center (NASA's Goddard Space Flight Center)
German Research Foundation
Office of Science, Office of Basic Energy Sciences, of the US Department of Energy
NASA OSIRIS-REx Sample Analysis Participating Scientist Program (ORSA-PSP) award
Japan Society for the Promotion of Science under KAKENHI
NASA
University of Maryland, Baltimore County
Center for Research and Exploration in Space Science and Technology II cooperative agreement with NASA
TAWANI Foundation
Emerging Worlds
NASA | Goddard Space Flight Center (NASA's Goddard Space Flight Center)
WOS ID
001410695300001
Scopus ID
85217223404
PubMed ID
39990238
Erfassungsdatum
2025-04-11