Results 111 to 120 of about 428,712 (306)

Seismic reflection and topography insights into Ries crater diameter and megablock zone

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Most of the extensive crater‐wide geophysical studies at the Ries impact structure were made decades ago when the origin of the structure was still being debated. Although it is one of the most studied impact structures, its internal structure was not imaged in high resolution until recently.
Kaidi Karro   +5 more
wiley   +1 more source

Astrophysics in 1992

open access: yesPublications of the Astronomical Society of the Pacific, 1993
1992 was an astrophysically exciting year for most of us. E-mail lines buzzed with news of the COBE anistropy, the Gallex solar-neutrino flux, a pulsar with two planets, and the remarkable isotropy of the gamma ray burst sources seen by CGRO. Meanwhile, more routine work continued on problems like star formation that have been around for decades and ...
openaire   +3 more sources

Differential geometry of collective models

open access: yesAIMS Mathematics, 2019
The classical astrophysical theory of Riemann ellipsoids and the quantum nuclear theory of Bohr and Mottelson share a common mathematical foundation in terms of the differential geometry of a principal bundle ${\cal P}$ and its associated vector bundle E,
George Rosensteel
doaj   +1 more source

Kindberg, the fifth meteorite fall in Austria: A weakly shocked L6 chondrite breccia with high‐pressure phases

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract A bright fireball was seen at 4:46 a.m. CET on November 19, 2020, over Austria, and also eye witnessed in Italy and Germany. The resulting Kindberg meteorite was the fifth well‐approved meteorite fall in Austria, and all rocks represent ordinary chondrites.
Addi Bischoff   +8 more
wiley   +1 more source

The Qingzhen reaction, a fine‐grained mineral assemblage associated with djerfisherite in some EH3 chondrites: Alteration on the EH parent body

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Enstatite chondrites formed under extremely reducing conditions in the protoplanetary disk. They are derived from two or more parent bodies, EH and EL, and both EH and EL groups contain petrologic type 3–6 samples. The rare lithophile‐ and halogen‐bearing sulfide, djerfisherite, occurs in low abundance in enstatite chondrites, most frequently ...
Peter Mc Ardle   +9 more
wiley   +1 more source

Textural and geochemical diversity of impact melt rock clasts in Apollo 16 sample 67015: Implications for the provenance of impact ejecta in the lunar highlands

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Apollo sample 67015 has been classified as a fragmental breccia comprised of highlands‐type clasts and is proposed to be the most complex Apollo 16 sample. 67015 is dominated by impact melt rock clasts that display a variety of textures, which have been previously interpreted to be indicative of multiple impact events.
Tara S. Hayden, Gordon R. Osinski
wiley   +1 more source

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