The Comets of 2001: Part 2
This is the author’s second report of the comets of 2001.
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Archives
Topography of the Alphonsus and Arzachel area of the Moon
Alphonsus (111km diameter) is one of the most intensively studied craters in the solar system.
Read moreThe Occultation Machine of HM Nautical Almanac Office
This paper describes an ingenious Occultation Machine that simplified the process of making occultation predictions.
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