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Material porosity and internal structure can significantly affect crater shape, ejecta field, and momentum enhancement from a kinetic impactor.
The Olympus Maculae reveal multiple episodes of wind-driven deposition and erosion, suggesting fluctuating atmospheric conditions in the Late Amazonian.
High-altitude balloon flights provide a cost-effective means to test planetary gamma-ray and neutron spectrometers in a space-like radiation environment.
The proxy we derive for magnetic field direction upstream of Mars will be useful when MAVEN’s orbit gets lowered such that it goes into the solar wind less often.
Oblique impacts significantly enhance projectile preservation. The results suggest a new strategy for sample return missions that rely on impact capture. Moreover, our findings imply that M-type aster
The color of sand on Mars’ dunes depends on grain size, composition, and oxidation state.
Water delivered by impactors can be trapped in significant quantities within impact glasses and melt-bearing breccias, thereby contributing to the early accretion of water during planet formation.
Titan's weather patterns suggest liquid methane reservoirs below the surface near Titan's poles.
More than ten tons of molecules and small neutral particles every second are flowing into Saturn from its rings because of the interaction between Saturn’s atmosphere and the rings.
The Hokusai impact could be the source of Mercury’s water ice.
Explosive volcanism on Mercury extended into Recent Geologic History, well after the presumed cessation of volcanic activity early in Mercury’s history.
Energetic disruption and reaccumulation produces top-shaped asteroids. More elongated asteroids like Eros and Itokawa form less commonly.
The MESSENGER Advanced Product (MEAP) project enhances the utility of MESSENGER data from the planet Mercury to the planetary science community.
Gamma-ray measurements can reveal the presence of compositionally-distinct deposits buried several 10s of cm below Mars’ surface.
The remarkable chemical diversity of comets reflects the range of conditions in the early Solar System
The APL Planetary Impact Lab (PIL) includes a Vertical Gun Range and Ejecta Catapult that enable state-of-the-art studies of impact cratering processes.
The uneven distribution of Mercury’s ice supports a comet impact origin
A collapsing disk of debris could build topography to create a ridge around Iapetus
Giant impact melting may have prolonged igneous activity on protoplanets
Debris generated after the Moon-forming impact would have re-impacted the Moon, introducing additional heat transfer mechanisms to the conventional conductive-lid scenario.
Low Reflectance Material on Mercury is enriched in carbon, and is native to Mercury.
We have detected hydrated minerals on the two largest near-Earth asteroids, expected to be anhydrous. They likely are delivered by external sources such as solar wind or dust.
An improved-resolution map of the MONS epithermal neutron data was created and reveals substantial, unexpected H deposits near the equator.
Mars’ current climate may be eroding away the most upwind sand dunes