Results 21 to 30 of about 1,847 (170)

Lunar Boulder Fields as Indicators of Recent Tectonic Activity

open access: yesThe Planetary Science Journal
Wrinkle ridges are the predominant tectonic structure on the nearside lunar maria. Although lunar wrinkle ridge formation began as early as ∼3.9–4.0 Ga, recent investigations have identified wrinkle ridges in the lunar maria that were tectonically active
Cole Nypaver   +10 more
doaj   +1 more source

Mapping of the lunar surface by average atomic number based on positron annihilation radiation from Chang’e-1

open access: yesEarth and Planetary Physics, 2018
A map of the average atomic number of lunar rock and soil can be used to differentiate lithology and soil type on the lunar surface. This paper establishes a linear relationship between the average atomic number of lunar rock or soil and the flux of ...
LiangQuan Ge   +4 more
doaj   +1 more source

Effects of Ambient Moisture and Large‐Strain Dynamic Preloading on the Dynamic Properties of the EAC‐1A Regolith Simulant

open access: yesInternational Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT The EAC‐1A lunar mare simulant, a silty sand, was selected by the European Astronaut Center (EAC) for use in the LUNA analogue facility's lunar simulation testbed. Its stress‐ and strain‐dependent shear modulus and damping ratio were determined via resonant column testing on specimens prepared either from ambient moisture material or oven ...
Christos Vrettos
wiley   +1 more source

Magma Activity History and Formation Mechanism of Lacus Somniorum, the Largest Lunar Lacus

open access: yesThe Planetary Science Journal
Lacus Somniorum, the largest lacus-type volcanic plain on the Moon, lies outside major impact basins and provides a key test case for understanding nonbasin mare formation.
Yihao Chen   +3 more
doaj   +1 more source

Radar Perspective of the Aristarchus Pyroclastic Deposit and Implications for Future Missions

open access: yesThe Planetary Science Journal, 2023
The Aristarchus plateau represents one of the most complex volcanic provinces on the lunar surface and is host to the largest pyroclastic deposit on the Moon.
G. A. Morgan   +9 more
doaj   +1 more source

On the equipotential surface hypothesis of lunar maria floors [PDF]

open access: yesJournal of Geophysical Research: Planets, 1999
The equipotential surface hypothesis suggests that lunar maria floors lie on a surface parallel to the selenoid. This is examined using the spherical harmonic representations of the Clementine topography and Lunar Prospector gravity data. It is demonstrated that the floors of both circular and noncircular maria significantly deviate from an ...
Jafar Arkani‐Hamed   +2 more
openaire   +1 more source

The Scholar Imprisoned: Young‐Bok Shin's Decolonial Thought Against (Sub) Imperialisms in East Asia

open access: yesSociological Forum, EarlyView.
ABSTRACT This article reads Young‐Bok Shin (1941–2016) as a decolonial thinker who theorized transformative worldmaking from the standpoint of the oppressed, rooted in the historical experiences of East Asia. Against the (sub)imperial “logic of sameness” that structures colonial modernity in his social world, Shin advances gongbu (studying) as a ...
Veda Hyunjin Kim
wiley   +1 more source

Unveiling Basalt Distribution of Lunar Cryptomaria from Gravity and Topography when Considering the Effect of Surface Cover-layer and Density Correction

open access: yesThe Astronomical Journal
The cryptomaria preserves critical evidence of early lunar volcanism and thermal evolution, offering key constraints on the Moon’s internal heat flow and mantle melting processes.
Wensong Zhang   +3 more
doaj   +1 more source

The search for the ultimate exercise countermeasure to preserve crew health and ensure mission success in long‐duration spaceflight

open access: yesExperimental Physiology, EarlyView.
Abstract The current understanding of crew health maintenance is founded upon decades of physiological research conducted in terrestrial spaceflight analogues and in low Earth orbit, particularly on the International Space Station. However, as we progress towards the Lunar Gateway and interplanetary missions, it is imperative that the tools employed to
Rodrigo Fernandez‐Gonzalo   +3 more
wiley   +1 more source

Application of Machine Learning Techniques to Distinguish between Mare, Cryptomare, and Light Plains in Central Lunar South Pole−Aitken Basin

open access: yesThe Planetary Science Journal
We apply machine learning techniques to identify and map resurfacing units in the central South Pole−Aitken (SPA) basin using three Lunar Reconnaissance Orbiter (LRO) mission data sets: 321/415 nm and 566/689 nm band reflectance ratios from Hapke ...
Frank C. Chuang   +4 more
doaj   +1 more source

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