The Observer's Guide to Planetary Motion
by Ford
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To the naked eye, the most evident defining feature of the planets is their motion across the night sky. It was this motion that allowed ancient civilizations to single them out as different from fixed stars. �The Observer�s Guide to Planetary Motion� takes each planet and its moons (if it has them) in turn and describes how the geometry of the Solar System gives rise to its observed motions.
Although the motions of the planets may be described as simple elliptical orbits around the Sun, we have to observe them from a particular vantage point: the Earth, which spins daily on its axis and circles around the Sun each year. The motions of the planets as observed relative to this spinning observatory take on more complicated patterns. Periodically, objects become prominent in the night sky for a few weeks or months, while at other times they pass too close to the Sun to be observed. �The Observer�s Guide to Planetary Motion� provides accurate tables of the best time for observing each planet, together with other notable events in their orbits, helping amateur astronomers plan when and what to observe. Uniquely each of the chapters includes extensive explanatory text, relating the events listed to the physical geometry of the Solar System.
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An aparitie | 2014 |
Autor | Ford |
Dimensiuni | 23.1 x 15.2 x 1.5 cm |
Editura | Springer |
Format | Paperback |
Limba | Engleza |
Nr pag | 240 |
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