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sky1.doc
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1988-08-11
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"Sky"
An electronic ephemeris
"Sky" is written by Pierre Brind'Amour, a
professor in the Department of Classical Studies at the
University of Ottawa (Canada); his field of research is
ancient chronology, the evolution of calendars and the
history of astronomy and astrology. This historical
background is reflected in the program which can be run for
dates B.C. as well as A.D. The claimed accuracy (positions
are given to the nearest minute of arc), except for recently
discovered planets that are invisible to the naked eye,
extends to several centuries B.C. Other historical features
are the possibility of entering the program with Sundial
Time, also of using "M", the ratio of the length of the
longest day to the shortest, as an expression of
geographical latitude, and the display of ecliptic
coordinates in addition to equatorial coordinates for the
stars.
This version 1.0 of the program has been designed
for ease of use rather than for accuracy. One can get, for
example, the position of various stars, planets and comets
for the same time and place variables, or one can vary data
from the time and place variables in order to study the
movement of a particular celestial body.
Improvements considered for future versions of the
program are increased precision (to arc sec and beyond) and
what goes with it (use of Dynamical Time for example),
addition of a Messier object catalog, search of stars by
name or by position, position of the Galilean satellites of
Jupiter, an improved and amplified on-disk manual, a
tutorial on Positional Astronomy, etc.