نتایج جستجو برای: lunar phases
تعداد نتایج: 116023 فیلتر نتایج به سال:
Introduction: Dhofar 733 is a 98-g lunar meteorite collected in the Dhofar region of Oman in 2002 [1]. In the initial description [1], Dhofar 733 is described as an anorthositic granulitic breccia, one that is probably not paired with any other lunar meteorite on the basis of its unique texture and isolation from other lunar meteorites (the next closest lunar meteorite was found 22 km away). Th...
We report the surface exploration by the lunar rover Yutu that landed on the young lava flow in the northeastern part of the Mare Imbrium, which is the largest basin on the nearside of the Moon and is filled with several basalt units estimated to date from 3.5 to 2.0 Ga. The onboard lunar penetrating radar conducted a 114-m-long profile, which measured a thickness of ∼5 m of the lunar regolith ...
Introduction: Modelling the dynamic evolution of the interior of the Moon is intrinsically linked to the density of lunar materials at high pressures and temperatures. Lunar magma density variations during crystallisation of the lunar magma ocean are particularly important, since the formation of plagioclase-rich highland rocks and mare basalts are related to density differences between lunar m...
The morphology shape and texture of dust fractions of five Apollo lunar soils and a lunar dust simulant, JSC-1Avf, was studied using scanning electron microscopy. Shape aspect ratio and complexity of particles was described based on the two-dimensional projection images. The distributions of aspect ratio and complexity of particles are reported. It was determined that the Apollo lunar dust part...
On 21 July 1969, during the first manned lunar mission, Apollo 11, the first retroreflector array was placed on the moon, enabling highly accurate measurements of the Earthmoon separation by means of laser ranging. Lunar laser ranging (LLR) turns the Earthmoon system into a laboratory for a broad range of investigations, including astronomy, lunar science, gravitational physics, geodesy, and ge...
Drilling samples of lunar soil is an important and indispensable part of China’s lunar exploration project. The drill bit temperature during the drilling process is one of the key concerns for scholars, especially for the hard lunar rock drilling in vacuum. In this article, the simulation analysis of drilling in atmosphere and vacuum is conducted. Moreover, a fiber grating temperature measuring...
Prospecting for Lunar Oxygen with Gamma-Ray Spectrometry and Multispectral Imaging C. C. Allen, C. M. Weitz, and D. S. McKay ...........................................................................19 Reliability of Calculating Average Soil Composition of Apollo Landing Sites A. Basu and S. Riegsecker ...............................................................................................
Paleomagnetic analyses of lunar samples indicate that the Moon had a dynamo-generated magnetic field with ~50 μT surface field intensities between 3.85 and 3.56 Ga followed by a period of much lower (≤ ~5 μT) intensities that persisted beyond 2.5 Ga. However, we determine herein that there is insufficient energy associated with core convection—the process commonly recognized to generate long-li...
Lunar habitat design is a complex endeavor characterized by complicated task-composition, numerous internal iterations, and intense task-coupling. The process of assembled building in terrestrial construction the system composition lunar habitats have been constructed. However, there insufficient experience to fully understand missions likewise coordination between architects various discipline...
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