Lectures on Astronomy; illustrated by the Astronomicon, or a series of moveable diagrams ... With an appendix containing ... questions ... and ... problems on the Astronomicon |
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3d magnitude 4th magnitude already angle appear astronomers atmosphere axis becomes beginning bodies called cause centre circle Comet consequently considered constellation contains continue dark describe diameter direction disc distance drawn Earth ecliptic effect equal equator explained fall figure fixed stars force four given globe greater greatest head heavens horizon inclined increase Jupiter latitude latter LECTURE length less light longitude luminous lunar magnitude manner mean Mercury meridian method miles minutes Moon Moon's motion move natural nearly nodes northern observed opposite orbit parallax parallel particular pass period phenomena planet pole position principal produced rays respective revolve rise rotation round satellites Saturn seconds seen shadow side signs situated solar sometimes southern sphere stars Sun's supposed surface tail take place tion true Venus visible whole
