Results 91 to 100 of about 12,699 (236)

Regolith in Motion: Dynamic Surface Evolution After Lunar Impacts

open access: yesGeophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Multi‐temporal observations captured by the Lunar Reconnaissance Orbiter Camera provide valuable insights into contemporary surface changes. These images reveal that minor impact events (resulting in <100‐m diameter craters) significantly alter regolith structure over great distances (>1,000 crater diameters) by increasing the meter‐to ...
E. J. Speyerer   +2 more
wiley   +1 more source

Ejecta velocities in twice-shocked liquid metals under extreme conditions: A hydrodynamic approach

open access: yesMatter and Radiation at Extremes, 2019
We apply a hydrodynamic approach to analyze ejecta emanating from doubly shocked liquid metals. In particular, we are interested in characterizing ejecta velocities in such situations by treating the problem as a limiting case of the ...
V. Karkhanis, P. Ramaprabhu
doaj   +1 more source

Ejecta types on Ganymede and Callisto

open access: yes, 1987
Ejecta types on Ganymede and Callisto have been identified from Voyager 1 and 2 images. Image resolution used range from approx. 0.6 to approx. 4 km/pxl, which allowed the surveying of almost all of the mappable surface of the two satellites.
Greeley, Ronald, Horner, V. M.
core  

Spectroscopic r-process Abundance Retrieval for Kilonovae. II. Lanthanides in the Inferred Abundance Patterns of Multicomponent Ejecta from the GW170817 Kilonova

open access: yesThe Astrophysical Journal
In kilonovae, freshly synthesized r -process elements imprint features on optical spectra, as observed in AT2017gfo, the counterpart to the GW170817 binary neutron star merger.
Nicholas Vieira   +5 more
doaj   +1 more source

Craters Without Ejecta

open access: yes, 2012
A significant portion of the Solar System's population of minor bodies may be quite porous. A unique aspect of crater formation in porous bodies is that large craters may form without the ejecta deposits that are associated with craters on less porous ...
Housen, Kevin R., Holsapple, Keith A.
core  

Pseudomyrma ejecta

open access: yes
14. Pseudomyrma ejecta. Worker. Length 1 1/2 line.-Rufo-testaceous, smooth and shining: the head, hinder part of the thorax, femora and tibiae, darker-coloured; abdomen blackish-brown; the thorax strangulated in the middle, the first node of the petiole subelongate, a minute tooth at the base of the petiole beneath, both the nodes rufo-testaceous; the ...
openaire   +2 more sources

Ejecta fragmentation in impacts into gypsum and water ice [PDF]

open access: yes, 2011
Using the light gas gun at the Open University's hypervelocity impact facility, a series of impact experiments exploring impacts into water ice and gypsum have been performed.
Mason, N.J.   +11 more
core   +1 more source

Simultaneous Detection of the Size and Velocity of the Largest Ejecta Particles with Velocities Exceeding 1 km s−1

open access: yesThe Planetary Science Journal
Impact ejecta with velocities exceeding the escape velocity of planetary bodies become meteorites and dust particles in interplanetary space. We present a new method that allows simultaneous measurement of the size and velocity of the largest high ...
Akiko M. Nakamura   +2 more
doaj   +1 more source

Life on Mars? The physiological perspective

open access: yes
Experimental Physiology, EarlyView.
Ronan M. G. Berg, Damian M. Bailey
wiley   +1 more source

Estimating the Contribution of Dynamical Ejecta in the Kilonova Associated with GW170817

open access: yesThe Astrophysical Journal Letters, 2017
The source of the gravitational-wave (GW) signal GW170817, very likely a binary neutron star merger, was also observed electromagnetically, providing the first multi-messenger observations of this type.
B. P. Abbott   +1101 more
doaj   +1 more source

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