The Planetary and Stellar Worlds: A Popular Exposition of the Great Discoveries and Theories of Modern Astronomy. In a Series of Ten LecturesC. Scribner, 1868 - 320 páginas |
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Términos y frases comunes
absolute accomplished actually aphelion appear astonishing astronomer axis beautiful body bright celestial sphere centre centrifugal force circle cluster comet commenced computed constellations curve detected determined diameter direction discovered discovery double stars earth earth's orbit eccentricity eclipse efforts entire equal equator examination existence fact finally fixed stars force grand Halley's comet heavens Herschel impossible inclined increase instrument investigation Jupiter Kepler law of gravitation light limits magnitude matter mean distance mighty miles Milky millions mind moon moon's motion move movements mysterious nearly nebula night object observation observatory orbs parallax pass perihelion period perturbations philosopher planet planetary planetary orbits position precisely present primitive problem proper motion Ptolemy reached remarkable retrograde motion revealed revolution revolving round satellites Saturn seen slowly solar system sphere Struve sun and moon sun's sweeping tance telescope theory thousand tion truth Uranus vast velocity visible wonderful