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Is the vorticity vector of the galaxy perpendicular to the galactic plane? I. Precessional correction and equinoctial motion correction to the FK5 system
The systematic stellar velocity field of about 30 000 K-M giants in the heliocentric distance interval 0.5-1.0 kpc is examined, on the basis of the three-dimensional Ogorodnikov-Milne model for theExpand
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$\Delta T$ and the Tidal Acceleration of the Lunar Motion from Eclipses Observed at Plural Sites
An eclipse on 188 BC July 17 was observed and recorded both at Chang’an (China) and Rome (Italy). An eclipse on AD 873 July 28 was observed and recorded both at Nishapur (Iran) and Kyoto (Japan). TheExpand
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Is the vorticity vector of the Galaxy perpendicular to the Galactic plane? II - Kinematics of the Galactic warp
A warping motion inherent in the galactic warp is detected, based on the proper motions of about 2000 young generation stars which consist of O-B5 stars, supergiants and bright giants of any spectralExpand
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Time variation of the moment of inertia of the Earth derived from Chinese and Japanese records of ancient solar eclipses
Time variation of the Earth’s rate of rotation from BC 709 through AD 975 is obtained from Chinese and Japanese records of solar eclipses. Chinese records employed in the present article are theExpand
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LCROSS (Lunar Crater Observation and Sensing Satellite) Observation Campaign: Strategies, Implementation, and Lessons Learned
NASA’s LCROSS (Lunar Crater Observation and Sensing Satellite) mission was designed to explore the nature of previously detected enhanced levels of hydrogen near the lunar poles. The LCROSS missionExpand
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A ground-based observation of the LCROSS impact events using the Subaru Telescope
Abstract The Lunar Crater Observation and Sensing Satellite (LCROSS) mission was an impact exploration searching for a volatile deposit in a permanently shadowed region (PSR) by excavatingExpand
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Commission 4 was among the first set of commissions formed within the IAU at its founding in 1919. (Commissions were originally called “Standing Committees.”) During its 96 years of service to theExpand
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The Reliability of the Records of Observed Solar Eclipses in India and Comparison with Contemporaneous Eclipse Data from Other Countries
In this paper, we examine the reliability of the records of solar eclipses observed in southern India taken from recently compiled records of solar eclipses. Observations in AD 938, 1087 and 1268Expand
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On the effects of dip and refraction in calculating the times of sunrise and sunset
Incorrect formulae for the e#ects of dip and refraction have been used for the times of sunrise and senset in the Chronological Scientific Tables (Rika nenpyo) edited by the National AstronomicalExpand