How to predict and calculate the positions of stars, planets, the
sun, the moon, and satellites using a personal computer and high
school mathematics. Our knowledge of the universe is expanding
rapidly, as space probes launched decades ago begin to send
information back to earth. There has never been a better time to
learn about how planets, stars, and satellites move through the
heavens. This book is for amateur astronomers who want to move
beyond pictures of constellations in star guides and solve the
mysteries of a starry night. It is a book for readers who have
wondered, for example, where Saturn will appear in the night sky,
when the sun will rise and set, or how long the space station will
be over their location. In Celestial Calculations, J. L. Lawrence
shows readers how to find the answers to these and other astronomy
questions with only a personal computer and high school math. Using
an easy-to-follow step-by-step approach, Lawrence explains what
calculations are required, why they are needed, and how they all
fit together. Lawrence begins with basic principles: unit of
measure conversions, time conversions, and coordinate systems. He
combines these concepts into a computer program that can calculate
the location of a star, and uses the same methods for predicting
the locations of the sun, moon, and planets. He then shows how to
use these methods for locating the many satellites we have sent
into orbit. Finally, he describes a variety of resources and tools
available to the amateur astronomer, including star charts and
astronomical tables. Diagrams illustrate the major concepts, and
computer programs that implement the algorithms are included.
Photographs of actual celestial objects accompany the text, and
interesting astronomical facts are interspersed throughout. Source
code (in Python 3, JAVA, and Visual Basic) and executables for all
the programs and examples presented in the book are available for
download at https://CelestialCalculations.github.io.
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