Results 71 to 80 of about 3,693 (177)
Meteoritics &Planetary Science, EarlyView.Abstract Production rates for the cosmogenic radionuclides 10Be, 14C, 26Al, 36Cl, 41Ca, 53Mn, and 60Fe in a large variety of meteorites, that is, ordinary chondrites (H, L, LL), carbonaceous chondrites, HED meteorites, ureilites, Martian meteorites, and iron meteorites and in the uppermost ~2 m of the lunar surface are modeled.
Ingo Leya
wiley +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract The Atacama Desert in Chile is characterized by its high meteorite density and old meteorite terrestrial ages. In this work, we present new terrestrial ages derived from measurements of the concentration of cosmogenic 36Cl in the metal fraction of 51 ordinary chondrites collected over a 6.8 km2 area located in the Catalina Dense Collection ...
Carine Sadaka +13 more
wiley +1 more source
Candidate Main-belt Asteroids for Surface Heterogeneity
The Astronomical JournalLarge terrestrial bodies in our solar system like the Earth, Mars, Mercury, and the Moon exhibit geologically complex surfaces with compositional heterogeneity.
Sunao Hasegawa +12 more
doaj +1 more source
Microbial Endolithic Community at Meteor Crater
Meteoritics &Planetary Science, EarlyView.Abstract Postimpact recovery and evolution in response to climate changes produced a modern ecosystem at Meteor Crater dominated by a grassland and woodland of piñon and juniper, which has been used to evaluate floral and megafaunal consequences of impact cratering during the Phanerozoic Eon of complex life.
David A. Kring, Charles S. Cockell
wiley +1 more source
The Astrophysical Journal LettersM-type asteroids are historically thought to be exposed metallic cores of differentiated planets with a composition dominated by pure iron and nickel. However, recent spectral and radar observations reveal an insufficient number of M-type asteroids in ...
Tian Zhang +7 more
doaj +1 more source
Finding the aten asteroids posing potential danger for Earth
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2007 We made the research of orbit evolutions of 321 aten asteroids on the 400 years time interval (1800–2200). We found five asteroids which come close to the Earth at a distance less than 150000 km.
S. S. Denisov
doaj +1 more source
Non‐innocent solvents in meteorite extractions: Evidence for artifact formation
Meteoritics &Planetary Science, EarlyView.Abstract Solvent extraction is a cornerstone of meteoritic organic and inorganic chemistry, yet the assumption that common solvents act as chemically inert media is becoming increasingly untenable. This study reports that low‐molecular‐weight alcohols, particularly methanol and ethanol, are “non‐innocent” solvents when used to extract soluble sulfur ...
N. Randazzo +6 more
wiley +1 more source
Identifying LL Chondrite Near-Earth Asteroids Using LL Chondrite Reflectance Spectra
The Astrophysical Journal LettersMost near-Earth objects are thought to originate from the collisional fragments of the main asteroid belt. One question that remains to be resolved is the proportion of near-Earth objects sampling the core area material of the parent body to the outer ...
Pengyue Wang +3 more
doaj +1 more source
Assessment of Flyby Methods as Applied to Close Encounters among Asteroids
AerospaceOrbital flybys have been extensively studied for spacecraft missions, resulting in effective mathematical and physical models. However, these models’ applicability to natural encounters involving asteroids has not been explored.
Nicolò Stronati +3 more
doaj +1 more source