Results 81 to 90 of about 130,178 (205)

Project Summaries, 1989 - 1990 [PDF]

Student designs summarized here include two undergraduate space designs and five graduate space designs from fall 1989, plus four undergraduate space designs and four undergraduate aircraft designs from spring 1990.

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Lunar Communication and Navigation Systems: A Comprehensive Survey, Research Challenges, and an Architectural Roadmap

IEEE Access
The desire to return to the Moon and establish a sustained human and robotic presence on its surface has intensified research on communication and navigation infrastructures capable of supporting future lunar missions.
Estela Marine-Roig, Victor Monzon Baeza
doaj   +1 more source

Sixteenth Lunar and Planetary Science Conference. Press abstracts [PDF]

A broad range of topics concerned with lunar and planetary science are discussed. Topics among those included are, the sun, the planets, comets, meteorities, asteroids, satellites, space exploration, and the significance of these to ...

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Near-infrared Photometry of the Moon’s Surface with Passive Radiometry from the Lunar Orbiter Laser Altimeter (LOLA)

The Planetary Science Journal
Examining the reflectance of the Moon’s surface across a broad range of viewing geometries through photometric analysis can reveal physical and geological properties of its regolith.
Ryan T. Walker, Michael K. Barker, Erwan Mazarico, Xiaoli Sun, Gregory A. Neumann, David E. Smith, James W. Head, Maria T. Zuber   +7 more
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Meteoroid flux at sub-meter scales is homogeneous across the Lunar nearside and farside

Communications Earth & Environment
The spatial heterogeneity of meteoroid impact flux has shaped the space weathering environment across the lunar surface, driving key evolutionary processes such as crater degradation, regolith gardening, and soil grain exposure.
Renrui Liu, Sizhe Zhao, Yi Xu, Qiquan Yang, Xiaoping Zhang, Chenkun Sun, Pengwei Luo, Rui Chen, Yanyan Xu, Xindong Meng, Jiahui Liu, Yun Qin, Yang Li   +12 more
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Proof of Principle of the Lunar Soil Volatile Measuring Instrument on Chang’ e-7: In Situ N Isotopic Analysis of Lunar Soil

Aerospace
The nitrogen isotopic compositions of lunar soil have important implications for the sources of lunar volatiles and even the evolution of the moon.
Ye He, Huaiyu He, Ziheng Liu, Fei Su, Jiannan Li, Yanan Zhang, Rongji Li, Xinyu Huang, Xuhang Zhang, Chao Lu, Shengyuan Jiang, Junyue Tang, Ranran Liu   +12 more
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Temporal Variations of 222Rn Density Distributions in the Lunar Exosphere

The Planetary Science Journal
Because of radiogenic processes, the lunar interior is a source of rare gases like helium ( ^4 He), argon ( ^40 Ar), and radon ( ^222 Rn) that might be released continuously, or impulsively during moonquakes. The detection of radon is therefore important
Ian-Lin Lai, Wing-Huen Ip
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Mapping Potential Hazards and Identifying Sampling Points within Lunar South Polar Region Areas of Interest

The Planetary Science Journal
The lunar south polar region is an area of interest geologically, and so it is a target for many future missions. These target areas are being investigated in detail, particularly in relation to the illumination conditions, Earth visibility, thermal ...
Sarah J. Boazman, David Heather, Hiroka Inoue, Makiko Ohtake   +3 more
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Evolution of the Lunar Tectonic Framework and Structures

Space: Science & Technology
The evolution of the Moon is driven by both endogenic (e.g., magmatism) and exogenic processes (e.g., impact). The lunar surface can be divided into 3 first-order tectonic units based on differences in geochemistry, crustal thickness, topography, and ...
Kai Zhu, Jianzhong Liu, Gregory Michael, Jingwen Liu, Juntao Wang, Jingyi Zhang, Congzhe Wu, Sheng Zhang, Xuejin Zeng   +8 more
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First Lunar Outpost support study [PDF]

The First Lunar Outpost (FLO) is the first manned step in the accomplishment of the Space Exploration Initiative, the Vice President's directive to NASA on the 20th anniversary of the Apollo moon landing. FLO's broad objectives are the establishment of a
Bartz, Christopher, Cook, John, Rusingizandekwe, Jean-Luc   +2 more
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