Results 71 to 80 of about 17,020 (222)
EPJ Web of Conferences, 2012 The effect of the impact angle of projectiles on the crater shape and ejecta in thick aluminum alloy targets was investigated in hypervelocity impacts.
Hayashi K., Nishida M., Ito Y.
doaj +1 more source
Journal of Geophysical Research: Planets, Volume 131, Issue 10, October 2026.Abstract Reliable estimates of seismic source size on Mars are critical for interpreting tectonic activity and impact processes, constraining the planet's interior evolution, and informing the design of future Martian seismic experiments. However, because InSight observations are limited to a single station, magnitude estimates cannot rely on empirical
Jung‐Hun Song +4 more
wiley +1 more source
, 2015 Surtseyan ejecta are formed in shallow sub-aqueous volcanic eruptions. They occur when water, containing a slurry of previously erupted material, is washed into the volcanic vent.
Greenbank, Emma +1 more
core +1 more source
Ancient Impact Melt Near the Lunar South Pole: Distribution, Provenance, and Sampling Strategy
Journal of Geophysical Research: Planets, Volume 131, Issue 10, October 2026.Abstract Due to a lack of pre‐Nectarian samples associated with specific impacts in the Apollo suite, the early Solar System's impact chronology is poorly constrained. We investigate where Artemis and other south polar lunar missions could sample impactites to determine the ages of pre‐Nectarian craters, focusing on the ancient craters Haworth ...
J. K. Ando +10 more
wiley +1 more source
Ejecta types on Ganymede and Callisto [PDF]
, 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
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Hardware released during spacecraft entry can generate hypervelocity impacts that provide unique constraints on planetary subsurface properties. During NASA's Perseverance descent, two tungsten cruise ballast mass devices (CBMD) and fragments of the cruise stage formed meter‐scale craters north‐west of Jezero crater, in one of the sinuous ...
A. J. Sokołowska +4 more
wiley +1 more source
Impact Craters Reveal a Deeper Rock‐Poor Regolith in the Lunar Highlands
Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.Abstract The only measurements of the highlands regolith occurred at the Apollo 14 and 16 landing sites, finding 10–15 m thick regolith; however, we show that the Apollo landing sites are anomalous due to their proximity to rare, highlands rocky craters and because they landed atop basin ejecta. Through observations of rocky crater populations, we show
M. A. Chertok +4 more
wiley +1 more source
r-process Heating Feedback on Disk Outflows from Neutron Star Mergers
The Astrophysical JournalNeutron star mergers produce r -process elements, with yields that are sensitive to the kinematic and thermodynamic properties of the ejecta. These ejecta properties are potentially affected by dynamically important feedback from r -process heating ...
Li-Ting Ma +3 more
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Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.Abstract Estimating Mercury's radial contraction is key to understanding the planet's geodynamic evolution. Contraction has been inferred from mapped shortening structures, whose heterogeneous distribution contradicts the isotropic contraction expected from global cooling.
G. Nishiyama +6 more
wiley +1 more source
, 2014 The dynamic fragmentation of a fine grained granitoid material has been examined. Target thicknesses ranged from 7 to 40 mm and impact energies from 12 to 2,500 J.
Rogers, Robert +4 more
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