Spherical or positional astronomy is used primarily to map objects
on the celestial sphere. In this technical work, first published in
1908 and intended for advanced students, Sir Robert Stawell Ball
(1840-1913) breaks down the field into distinct areas of study.
Assuming a good level of geometry and trigonometry, he begins with
fundamental formulae before moving into the determination of
coordinates, atmospheric refraction, the theory of cartography, and
more. Each section contains exercises derived from a variety of
sources, including contemporary Cambridge examinations. The
coverage ranges from the calculation of stellar parallax to the
geometrical principles behind the Mercator projection. Testifying
to the knowledge expected of university students in the early
twentieth century, Ball's book remains instructive to their modern
counterparts. More accessible to the general reader, The Story of
the Heavens (1885), Star-Land (1889) and A Popular Guide to the
Heavens (1905) are also reissued in this series.
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