MENTAL FIELD ASTRONOMY AND OTHER MATTERS
作者:
ShewellBriǵadier H. A. L.,
期刊:
Survey Review
(Taylor Available online 1963)
卷期:
Volume 17,
issue 129
页码: 113-121
ISSN:0039-6265
年代: 1963
DOI:10.1179/sre.1963.17.129.113
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractRule11A.Polaris, the North or Pole Star, may be taken as coincident with the north celestial pole and as indicating true north with an error never exceeding 2°except in polar latitudes. It can be seen, in favourable circumstances, down to 15°or even 10°North. The two stars in the Great Bear, known as the pointers, are too well known to need further description. It is worth memorising that the Pole lies at a distance from the most northerly of the two pointers equal to about 5 times the distance between them. This may be useful in low latitudes or when there are patches of slow-moving cloud about.
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