A casual look at the sky confronts one with uncountable pinpoints of light. It is imperative that we be able to refer to particular celestial objects without waiting for a cloudless and moonless night. Sky charts and coordinate systems are intrinsic to this task. It turns out, fortunately, that the motions of most celestial bodies relative to one another on the sky are quite slow; the Big Dipper will still look nearly the same in 50 years as it does now. It is therefore quite feasible to define coordinate systems on the sky and to make charts and maps of the brighter objects. In this chapter, we discuss some of the more common coordinate systems used by astrophysicists, the concept of solid angle and some of the charts and maps in use today.

Telescopes Mastery

Telescopes Mastery

Through this ebook, you are going to learn what you will need to know all about the telescopes that can provide a fun and rewarding hobby for you and your family!

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