Astronography, or, Astronomical geography, with the use of globes : arranged either for simultaneous reading and study in classes, or for study in the common method (1854)
xes should coincide with eachother, then the planes of the Great Circles must coincidealso; but if the Axes are so moved as to make angles atthe centre, then the plane of each Great Circle mustmove with its Axis, and just as many degrees. So thatthe two vertical angles made at the centre by the… … 6.21U MAYlO?™:-T40 A Oft 3. Although it is more systematic to begin with the In-tersection of the Axes and Great Circles, yet in formingthis union of two Systems into one, it is an angle madeby the Axis of the one System with the plane of the 2. What proves that they are equal each to each ? OTHER…
Astronomy
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