Results 11 to 20 of about 15,759 (253)

The Fine‐Scale Magnetic History of the Allende Meteorite: Implications for the Structure of the Solar Nebula

open access: yesAGU Advances, 2021
Magnetic fields in the early solar system may have driven the inward accretion of the protoplanetary disk (PPD) and generated instabilities that led to the formation of planets and ring and gap structures.
Roger R. Fu   +5 more
doaj   +1 more source

Possible Ribose Synthesis in Carbonaceous Planetesimals

open access: yesLife, 2022
The origin of life might be sparked by the polymerization of the first RNA molecules in Darwinian ponds during wet-dry cycles. The key life-building block ribose was found in carbonaceous chondrites.
Klaus Paschek   +7 more
doaj   +1 more source

Slow Neutron-Capture Process: Low-Mass Asymptotic Giant Branch Stars and Presolar Silicon Carbide Grains

open access: yesUniverse, 2022
Presolar grains are microscopic dust grains that formed in the stellar winds or explosions of ancient stars that died before the formation of the solar system.
Nan Liu, Sergio Cristallo, Diego Vescovi
doaj   +1 more source

Classification of meteorites by petrophysical methods [PDF]

open access: yesBulletin of the Geological Society of Finland, 1983
The low field magnetic susceptibility, natural remanent magnetization (NRM) and bulk density were measured for 75 meteorite samples from 54 meteorites ranging from achondrites through chondrites and stony-irons to irons.
I.T. Kukkonen, L.J. Pesonen
doaj   +1 more source

The breakup of the L-chondrite parent body 466 Ma and its terrestrial effects – a search for a mid-Ordovician biodiversity event [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
About a third of all meteorites that fall on Earth today, the stony L-chondrites, originate from a major breakup event in the asteroid belt 466 Ma, in the early Darriwilian.
Birger Schmitz, Fredrik Terfelt
doaj   +1 more source

On the survivability and detectability of terrestrial meteorites on the moon [PDF]

open access: yes, 2008
Materials blasted into space from the surface of early Earth may preserve a unique record of our planet's early surface environment. Armstrong et al. (2002) pointed out that such materials, in the form of terrestrial meteorites, may exist on the Moon and
Taylor, E.A.   +4 more
core   +1 more source

An Updated Catalog of Rayed Craters on Mars

open access: yesEarth and Space Science, 2023
Martian meteorites represent the only samples of Mars available for study in terrestrial laboratories. In addition to their crystallization and surface ejection ages, these samples provide a detailed understanding of the geochemistry of the martian crust.
Jennifer K. Harris   +4 more
doaj   +1 more source

Oxygen Isotopes and Volatiles in Martian Meteorite [PDF]

open access: yes, 2013
Oxygen isotopes were measured in mineral separates from martian meteorites using laser fluorination and were found to be remarkably uniform in both δ18O and Δ17O, suggesting that martian magmas did not assimilate aqueously altered crust regardless of any
Channon, Melanie Beth
core   +1 more source

The Prevailing Catalytic Role of Meteorites in Formamide Prebiotic Processes

open access: yesLife, 2018
Meteorites are consensually considered to be involved in the origin of life on this Planet for several functions and at different levels: (i) as providers of impact energy during their passage through the atmosphere; (ii) as agents of geodynamics ...
Raffaele Saladino   +2 more
doaj   +1 more source

A detailed record of the BELARE 2019-2020 meteorite recovery expedition on the Nansen Ice Field, East Antarctica

open access: yesAntarctic Record, 2021
This report summarizes the Belgian Antarctic Expedition (BELARE) 2019-2020 meteorite search and recovery expedition near the Sør Rondane Mountains of East Antarctica during the 2019-2020 field season.
Steven Goderis   +8 more
doaj   +1 more source

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