Results 71 to 80 of about 19,633 (239)
Наука и техника, 2016 The paper presents results of research for influence of plasma jet parameters (current, spraying distance, plasmasupporting nitrogen gas consumption), fractional composition of an initial powder and cooling degree by compressed air on characteristics of ...
V. A. Okovity +8 more
doaj +1 more source
Spectral analysis of four meteors [PDF]
Four meteor spectra are analyzed for chemical composition and radiative processes. The chemical compositions of the Taurid, Geminid, and Perseid meteors were found to be similar to that of a typical stony meteorite.
Harvey, G. A.
core +1 more source
The Compositional Structure of the Asteroid Belt
, 2015 The past decade has brought major improvements in large-scale asteroid discovery and characterization with over half a million known asteroids and over 100,000 with some measurement of physical characterization.
Alexander, Conel M. O'D. +4 more
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Meteoritics &Planetary Science, EarlyView.Abstract Terrestrial weathering alters the chemical and isotopic composition, and mineralogy, of meteorites; its effects on ordinary chondrites are well‐studied, but relatively little is known about the susceptibility of carbonaceous chondrites. We combined laboratory experiments, whereby Chwichiya 002 (C3‐ung find), Murchison (CM2 fall) and Kolang ...
Robin L. Haller +2 more
wiley +1 more source
Rb-sr ages of chondrules and carbonaceous chondrites [PDF]
Rubidium-strontium and potassium-strontium isotope composition of carbonaceous chondrites and chondrules - age of carbonaceous ...
Compston, W., Murthy, V. R.
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Nature's Starships II: Simulating the Synthesis of Amino Acids in Meteorite Parent Bodies
, 2015 Carbonaceous chondrite meteorites are known for having high water and organic material contents, including amino acids. Here we address the origin of amino acids in the warm interiors of their parent bodies (planetesimals) within a few million years of ...
Cobb, Alyssa K. +2 more
core +1 more source
Aqueous alteration in C2‐ung Bells through the analysis of carbonates – Does a CR origin ring true?
Meteoritics &Planetary Science, EarlyView.Abstract Bells is an ungrouped carbonaceous chondrite that has in recent years been proposed as a CR‐an. This link to CR chondrites has previously been identified through the analysis of anhydrous silicates, for example, oxygen isotopic compositions of olivine (Marrocchi et al., 2023).
L. J. Riches +4 more
wiley +1 more source
The Meteoritical Bulletin, No. 114
Meteoritics &Planetary Science, EarlyView.Abstract Meteoritical Bulletin 114 contains the 1944 meteorites approved by the Nomenclature Committee of the Meteoritical Society in 2025. It includes 15 observed falls, 1336 ordinary chondrites, 213 HED, 106 carbonaceous chondrites (including 8 ungrouped), 86 lunar meteorites, 39 ureilites, 28 iron meteorites (2 ungrouped), 24 martian meteorites, 24 ...
Jérôme Gattacceca +12 more
wiley +1 more source
Isotopic composition of gadolinium in meteorites.
GEOCHEMICAL JOURNAL, 1979 An alternative explanation is presented for the neutron effects observed by EUGSTER et al. (1970) in Gd extracted from the Norton County achondrite. It is suggested that an ‘early’ irradiation of the solar system material occurred at a temperature much higher than 200°K assumed by the above investigators.
openaire +2 more sources
, 2017 Asteroids that are targets of spacecraft missions are interesting because they present us with an opportunity to validate ground-based spectral observations. One such object is near-Earth asteroid (NEA) (162173) Ryugu, which is the target of the Japanese
Becker, Kris J. +9 more
core +1 more source