Results 101 to 110 of about 10,634 (253)

New knowledge about shock events that affected the L‐chondrite parent body from two heavily shocked L6 meteorite finds

Meteoritics &Planetary Science, EarlyView.
Abstract We report new results from a study of shock‐related features in the L6 ordinary chondrites Northwest Africa (NWA) 4672 and NWA 12841. Our observations confirm the occurrence of eight high‐pressure (HP) minerals in each meteorite, namely, ringwoodite, majorite, akimotoite, wadsleyite, albitic jadeite, lingunite, tuite, and xieite.
I. Baziotis, L. Ferrière, C. Ma, J. Hu, D. Palles, P. D. Asimow   +5 more
wiley   +1 more source

Martian buildings: structural forms using in-place sources. [PDF]

Sci Rep, 2022
Soureshjani OK, Massumi A.
europepmc   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Geminids are initially cracked by atmospheric thermal stress

Astronomy & Astrophysics
Context. Geminids have the highest bulk density of all major meteor showers and their mechanical strength appears to depend on their mass. They are also the most active annual shower, enabling detailed studies of the dependence of their physical and ...
Henych Tomáš, Borovička Jiří, Čapek David, Vojáček Vlastimil, Spurný Pavel, Koten Pavel, Shrbený Lukáš   +6 more
doaj   +1 more source

Photographic fireball networks [PDF]

Long term radar observations of any meteor shower yield good data for a study of the features of its cross section structure in detail. The hourly rates of meteor echoes represent usually the basic data from which shower characteristics are derived ...
Ceplecha, Z.
core   +1 more source

Lawnmower Poetry and the Poetry of Lawnmowers

Critical Quarterly, EarlyView.
Francesca Gardner
wiley   +1 more source

Determining impact angle from the spatial distribution of shock metamorphism: A case study of the Gosses Bluff (Tnorala) impact structure, Australia

Meteoritics &Planetary Science, EarlyView.
Abstract The majority of planetary impacts occur at oblique angles. Impact structures on Earth are commonly eroded or buried, rendering the identification of the direction and angle of impact—using methods such as asymmetries in ejecta distribution, surface topographic expression, central uplift structure, and geophysical anomalies—challenging. In this
Eloise E. Matthews, Auriol S. P. Rae, Thomas Kenkmann, Nicholas E. Timms, Aaron J. Cavosie, Marian B. Holness   +5 more
wiley   +1 more source

Meteoroid velocity distribution derived from head echo data collected at Arecibo during regular world day observations [PDF]

Atmospheric Chemistry and Physics, 2004
We report the observation and analysis of ionization flashes associated with the decay of meteoroids (so-called head echos) detected by the Arecibo 430 MHz radar during regular ionospheric observations in the spring and autumn equinoxes.
M. P. Sulzer
doaj  

Glycine amino acid transformation under impacts by small solar system bodies, simulated via high-pressure torsion method. [PDF]

Sci Rep, 2022
Edalati K, Taniguchi I, Floriano R, Luchessi AD.   +3 more
europepmc   +1 more source

Meteoroid Engineering Model (MEM) 3: NASAs Newest Meteoroid Model [PDF]

Meteoroid impacts threaten spacecraft and astronauts at all locations within the Solar System. At certain altitudes in low-Earth orbit, orbital debris dominates the risk, but meteoroids are more significant within 250 km of the Earths surface and above ...
Moorhead, Althea V.
core   +1 more source