Results 61 to 70 of about 186,974 (222)

Evidence for electron Landau damping in space plasma turbulence

Nature Communications, 2019
Various physical mechanisms are proposed to explain the heating observed in turbulent astrophysical plasmas. Here, Chen et al. find a signature consistent with one of these mechanisms, electron Landau damping, by applying a field-particle correlation ...
C. H. K. Chen, K. G. Klein, G. G. Howes
doaj   +1 more source

Visible‐Shortwave Infrared (VSWIR) Spectral Parameters for the Lunar Trailblazer High‐Resolution Volatiles and Minerals Moon Mapper (HVM3)

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract The Lunar Trailblazer smallsat mission High‐resolution Volatiles and Minerals Moon Mapper (HVM3) science instrument was designed to acquire targeted spectral image cubes of the lunar surface at visible to shortwave infrared (VSWIR) wavelengths (0.6–3.6 μm) in an effort to understand the distribution, abundance, and form (OH, H2O, ice) of lunar
Angela M. Dapremont, Rachel L. Klima, Kierra A. Wilk, Bethany L. Ehlmann, Christopher S. Edwards, Kerri L. Donaldson Hanna, Valeriya Kachmar, Laura Lee, Jasper K. Miura, Carlé M. Pieters, Erin Pimentel, Katherine A. Shirley, David R. Thompson, Isabelle Adamczewski   +13 more
wiley   +1 more source

A Simplified Ordinary Differential Equation for the Surface Temperature of Airless Bodies

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract In this work, we develop simplified surface temperature models for spherical bodies with insignificant atmospheres, able to produce a latitude/longitude temperature map that includes seasonality effects. We start from the commonly employed depth‐dependent model by Spencer et al. (1989, https://doi.org/10.1016/0019‐1035(89)90182‐6) based on the
Stefano Boccelli, Orenthal J. Tucker, Jessica L. Noviello   +2 more
wiley   +1 more source

A Flat-bottomed Buried Crater and Paleo-layered Structures Revealed at the Von Kármán Crater Using Lunar Penetrating Radar

The Astrophysical Journal Letters
Impact cratering is the most common geological process occurring on terrestrial planets. The morphologies of impact craters reflect not only the impact conditions but the target properties as well.
Ling Zhang, Xindong Meng, Yuqi Qian, Yi Xu, Xiaoping Zhang, Zhipeng Liu, Jialong Lai, Rui Gao   +7 more
doaj   +1 more source

ṬULŪ’ AL-HILĀL Rekonstruksi Konsep Dasar Hilāl

Al-Ahkam, 2014
This paper intends to review the basic concepts of crescent issue as the most fundamental concepts of the Hijri calendar systems. The crescent basic concept of ṭulū‘ al-hilāl, based on these principles: first, put the crescent as a matter of objective ...
Nur Aris
doaj   +1 more source

Diurnal Temperature Variability at Latitudinally Distinct Sites on the Moon

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract The thermophysical environment of the Moon plays a crucial role for future exploration, resource utilization and also in understanding its geological evolution. While global‐scale surface temperature distributions have been reasonably well constrained through numerical modeling and orbiter observations, recent in situ measurements have ...
G. Ambily, K. Durga Prasad, Y. Ramakrishna   +2 more
wiley   +1 more source

Lunar Observation Support System Using Smartphone AR for Astronomy Education

International Journal of Interactive Mobile Technologies (iJIM), 2014
It is possible to improve learnersâ?? understanding of the concept of lunar phases by using Observation based Learning (OBL). In this research, Smartphone Augmented Reality (AR) technology was used to develop a multi-viewpoint AR-based mobile learning (M-VARML) system for moon observation that can be used in the real world environment.
Tian, Ke, Endo, Mamoru, Urata, Mayu, Mouri, Katsuhiro, Yasuda, Takami   +4 more
openaire   +3 more sources

Photometric and Spectral Characterization of Spacecraft Materials With Application to Lunar Trailblazer

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract If a spacecraft loses contact with Earth, ground‐based observatories can collect observations to assist the recovery effort by providing information on spacecraft location and state. Optical observations converted to a light curve of spacecraft magnitude over time show the spin period and/or orientation of the spacecraft.
A. V. Steckel, B. L. Ehlmann
wiley   +1 more source

Thermophysical Diversity of Young Lunar Crater Ejecta Revealed with LRO Diviner Observations

The Planetary Science Journal
Young (
Cailin L. Gallinger, Jean-Pierre Williams, Catherine D. Neish, Tyler M. Powell, Catherine M. Elder, Rebecca R. Ghent, Paul O. Hayne, David A. Paige   +7 more
doaj   +1 more source

The Evolution of a Polar Cap Patch Into a Blob in the Nightside Ionosphere: Direct Observations of Multiple Blob Formation Mechanisms Acting Simultaneously on the Same Plasma

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract A polar cap patch was observed to exit the polar cap to become a blob as it entered the auroral oval on the nightside of the Earth under moderately quiet geomagnetic conditions (Kp = 3−). Auroral particle precipitation led to an increase in the electron density of the blob.
S. J. Maguire, A. G. Wood, D. R. Themens, E. M. Henley, S. E. Milan, Y. Soobiah, K. Oksavik, W. J. Miloch, J. C. Coxon, M. G. Johnsen   +9 more
wiley   +1 more source