The role of cohesive forces in particle launching on the Moon and asteroids

2011 ◽  
Vol 59 (14) ◽  
pp. 1758-1768 ◽  
Author(s):  
Christine M. Hartzell ◽  
Daniel J. Scheeres
Keyword(s):  
The Moon ◽  
Cohesive Forces

scholarly journals Remotely distinguishing and mapping endogenic water on the Moon

2017 ◽  
Vol 375 (2094) ◽  
pp. 20150391 ◽  
Author(s):  
Rachel L. Klima ◽  
Noah E. Petro
Keyword(s):  
Solar Wind ◽  
Spatial Distribution ◽  
Solar System ◽  
The Moon ◽  
Testing Hypotheses ◽  
Origin And Evolution ◽  
Lunar Interior ◽  
Geological Features ◽  
Insight Into

Water and/or hydroxyl detected remotely on the lunar surface originates from several sources: (i) comets and other exogenous debris; (ii) solar-wind implantation; (iii) the lunar interior. While each of these sources is interesting in its own right, distinguishing among them is critical for testing hypotheses for the origin and evolution of the Moon and our Solar System. Existing spacecraft observations are not of high enough spectral resolution to uniquely characterize the bonding energies of the hydroxyl molecules that have been detected. Nevertheless, the spatial distribution and associations of H, OH − or H 2 O with specific lunar lithologies provide some insight into the origin of lunar hydrous materials. The global distribution of OH − /H 2 O as detected using infrared spectroscopic measurements from orbit is here examined, with particular focus on regional geological features that exhibit OH − /H 2 O absorption band strengths that differ from their immediate surroundings. This article is part of the themed issue ‘The origin, history and role of water in the evolution of the inner Solar System’.

Paradigm Shifts in the Pedagogical Approaches

2018 ◽  
pp. 343-362
Author(s):  
Deepika Tiwari
Keyword(s):  
Teaching And Learning ◽  
Dynamic Environments ◽  
Paradigm Shifts ◽  
The Moon ◽  
Theoretical Frameworks ◽  
Knowledge Based ◽  
Conventional Methods ◽  
Changing Knowledge ◽  
Pedagogical Approaches

The last century took us from covered wagons on the pampas to rockets on the moon. Similarly, education has observed a meritorious shift in the new millennium from the conventional methods to the emergence of contemporary approaches. The conventional education systems were based on certain philosophies, theoretical frameworks, and practices which maintained a sluggish environment wherein educating meant to transmit knowledge from expert to amateurs. However, these values and systems do not harmonize with the needs of the current dynamic environments where there is an unbelievable pool of advanced information. In light of this rapidly changing knowledge-based society, the role of teaching and learning is changing dramatically. Now is the era, where countries are looking for the emergence of ‘edupreneurs'.

scholarly journals The Role of Occultations in the Improvement of the Lunar Ephemeris

1972 ◽  
Vol 47 ◽  
pp. 395-401
Author(s):  
L. V. Morrison
Keyword(s):  
Time Scale ◽  
The Moon ◽  
Secular Acceleration ◽  
Lunar Ephemeris ◽  
Occultation Data ◽  
Correction Terms ◽  
Empirical Constants ◽  
Atomic Time

Analyses of occultation timings show that periodic correction terms with semi-amplitude as great as 0.″18 arise from corrections required to the empirical constants of the Brown/Eckert theory. Using the atomic time-scale, some of the occultation data have been used to determine a correction of – 30 ± 16″/cy2 to Spencer Jones' value for the secular acceleration of the Moon. In the light of this correction, and previous determinations, attention is drawn to the possible weakness of Spencer Jones' value, which is not reflected in his quoted error of ± 1″/cy2. Further analyses of 50000 occultations observed since 1943 promise to reveal more accurately-determined corrections.

scholarly journals The rôle of planetaria: The Library of Alexandria Planetarium Science Center

2009 ◽  
Vol 5 (S260) ◽  
Author(s):  
Hoda S. El-Mitaky
Keyword(s):  
Public Interest ◽  
Public Awareness ◽  
Light Pollution ◽  
The Moon ◽  
Science Center ◽  
The World ◽  
Ancient Times

AbstractIn ancient times the stars and the Moon were humans' only guide to cross the seas and explore the depths of the deserts. With the use of modern technological gadgets, and the increasingly light pollution, citizens of the world stopped looking at the heavens. How can planetaria play a rôle in reviving public interest in astronomy? How can the beauty of astronomy play a rôle in luring the youth to pursue a career in science? How can astronomy play a rôle in raising public awareness about preserving the environment? Moreover, how can astronomy play a rôle in the dialogue among civilisations?

scholarly journals On the Translation of “Drinking Alone under the Moon” Based on the Harmony-Guided Criteria for Poetry Translation

2019 ◽  
Vol 14 (1) ◽  
pp. 5
Author(s):  
Yan Qian ◽  
Wang Feng
Keyword(s):  
Chinese Culture ◽  
The Moon ◽  
Poetry Translation ◽  
Gains And Losses

Under Dr Wang Feng's Harmony-Guided Criteria for poetry translation, this paper attempts to conduct an analysis on four English versions of Li Bai's "Drinking Alone under the Moon" at three levels, exploring the gains and losses of each version and verifying the guiding role of the Harmony-Guided Criteria in poetry translation. It aims to provide some inspiration and reference for poetry translators and promote the dissemination of classic Chinese culture at the same time.

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