The Observer's Guide to Planetary Motion: Explaining the Cycles of the Night Sky by Dominic Ford (Paperback, 2014)
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- DescriptionTo 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 table events in their orbits, helping amateur astromers 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. Along the way, many questions are answered: Why does Mars take over two years between apparitions (the times when it is visible from Earth) in the night sky, while Uranus and Neptune take almost exactly a year? Why do planets appear higher in the night sky when they're visible in the winter months? Why do Saturn's rings appear to open and close every 15 years? This book places seemingly disparate astromical events into an understandable three-dimensional structure, enabling an appreciation that, for example, very good apparitions of Mars come around roughly every 15 years and that those in 2018 and 2035 will be nearly as good as that seen in 2003. Events are listed for the time period 2010-2030 and in the case of rarer events (such as eclipses and apparitions of Mars) even longer time periods are covered. A short closing chapter describes the seasonal appearance of deep sky objects, which follow an annual cycle as a result of Earth's orbital motion around the Sun.
- Author BiographyDr. Dominic Ford is an experienced observer of the night sky and a regular contributor to the 'Journal of the British Astronomical Association.' He obtained his MSc in Physics from the University of Cambridge (UK) in 2003 and a doctorate in Astrophysics (also from Cambridge) in 2008. He is a member of the Council of the British Astronomical Association, a Fellow of the Royal Astronomical Society and a Trustee of the British Astronomical Association (as of August 2011). Dominic has written 58 meeting reports for 'The Journal of the British Astronomical Association' over the past ten years and is a regular monthly contributor to 'the Naked Astronomy' podcast. Currently he is employed as a post-doctoral Research Associate working on the Square Kilometre Array in the Astrophysics Group, Department of Physics, University of Cambridge.
- Author(s)Dominic Ford
- PublisherSpringer-Verlag New York Inc.
- Date of Publication15/05/2014
- SubjectPopular Science
- Series TitleThe Patrick Moore Practical Astronomy Series
- Place of PublicationNew York
- Country of PublicationUnited States
- ImprintSpringer-Verlag New York Inc.
- Content Note51 black & white illustrations, 25 colour illustrations, biography
- Weight467 g
- Width155 mm
- Height235 mm
- Spine14 mm
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