Results 151 to 160 of about 86,334 (311)
Vertical profiling of shock attenuation at the Rochechouart impact structure, France
Meteoritics &Planetary Science, EarlyView.Abstract Rochechouart, south‐west France, is a complex impact structure. Here, we present the first report of shock barometry of quartz from what are likely parautochthonous basement units at depth, based on samples from the 2017 C.I.R.I.R drilling campaign. The crystallographic orientations of 725 sets of PDFs in 512 quartz grains in samples from four
P. Struzynska +4 more
wiley +1 more source
Meteoritics &Planetary Science, EarlyView.Abstract The Campo del Cielo iron meteorite (IAB‐MG) provides a unique window into early solar system processes, particularly the formation and evolution of carbon phases in non‐magmatic iron meteorites. In this study, we conducted a systematic nanostructural investigation of three distinct graphite occurrences—cliftonite (type I), interstitial ...
Xiao Tian Deng +8 more
wiley +1 more source
Ultra-compact structure in intermediate-luminosity radio quasars: building a sample of standard cosmological rulers and improving the dark energy constraints up to z ~ 3 [PDF]
, 2017 Shuo Cao +5 more
openalex +1 more source
Small but mighty: Impact hazards from iron Near‐Earth Objects
Meteoritics &Planetary Science, EarlyView.Abstract Small asteroids can impact Earth unexpectedly, as demonstrated by the Chelyabinsk event in 2013. The warning times are likely to be short, and the first tools for fast hazard predictions have been developed in the last years for encounters with rocky or cometary objects, which quickly fragment in the atmosphere and cause airbursts. However, in
Robert Luther +5 more
wiley +1 more source
A geophysical investigation of the Roter Kamm impact crater, Namibia
Meteoritics &Planetary Science, EarlyView.Abstract The Roter Kamm impact crater is located in the southern Namib Desert. The crater has a diameter of 2.5 km and belongs to the category of simple, bowl‐shaped impact craters, with an elevated rim of fractured target rock. The crater's interior is completely buried beneath sediments, preventing extensive surface investigations of the bedrock ...
Hannah Nienhaus +6 more
wiley +1 more source
Rapid terrestrial weathering of the CI1 carbonaceous chondrite find Oued Chebeika 002
Meteoritics &Planetary Science, EarlyView.Abstract Alteration of historic CI1 meteorite falls during their curation demonstrates the susceptibility of smectite‐rich carbonaceous chondrites to terrestrial exposure. The discovery of Oued Chebeika 002 in Morocco in June 2024 presents a unique opportunity to document the earliest stages of weathering of a CI1 find.
Martin R. Lee, Jasper Glazer
wiley +1 more source
Living Reviews in Relativity, 2001 This is a review of the physics and cosmology of the cosmological constant. Focusing on recent developments, I present a pedagogical overview of cosmology in the presence of a cosmological constant, observational constraints on its magnitude, and the ...
Carroll Sean M.
doaj
Symplectic Quantization II: Dynamics of Space–Time Quantum Fluctuations and the Cosmological Constant [PDF]
, 2021 Giacomo Gradenigo
openalex +1 more source
Sampling the volcanic plumes at Io: Impact speeds and shock conditions
Meteoritics &Planetary Science, EarlyView.Abstract The desire to sample material from the interior of Io, by flying through its volcanic plumes, requires consideration of the flyby speed and the types of sample collection techniques that can be utilized. Low speed collection (1–2.5 km s−1) would require an orbit around Io itself, which is unlikely due to the accumulated radiation dose that ...
M. J. Burchell +2 more
wiley +1 more source