The Planet Earth: An Astronomical Introduction to Geography

Aldebaran Algol altitude Andromeda angle angular distance apparent motion apparent path Arcturus astronomers attraction Betelgeuse bright star Cassiopeia celestial equator celestial pole celestial sphere centre circle circumference completely round constellation Copernican theory Denebola described diameter direction distance round diurnal motion earth east eastern horizon ecliptic ellipse equal fact fixed Foucault's pendulum globe gravitation Heaven Heaven Heaven hence inferior planets journey Jupiter lamp latitude lead ball length light loops luminary Mars mass measure meridian miles minutes moon movement moving round night noonday north and south north celestial pole object observed occupies opposite orbits Orion passes pendulum planet moves Pole-Star position precession Procyon Regulus revolution revolve round rising and setting round the sun Saturn seen side south at midnight spinning spring equinox stationary point summer solstice sun's suppose surface swing telescope tion triangle twilight visible watch zodiac