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Development of Astronomical Thought Astronomy
Beginnings of Astronomy
The Birth of Modern Astronomy
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200-inch telescope absolute magnitude acceleration amount angle angular appear astronomical atoms axis binary body bright celestial equator celestial pole celestial sphere cepheids circle clouds color comets corona craters density diameter direction disk distance earth earth's atmosphere eclipse electrons emission emitted energy example Figure force galactic gases globular clusters gravitational H-R diagram helium horizon hydrogen interstellar ionized Jupiter Kepler's km/sec known lens light luminosity luminous lunar main sequence Mars mass measured Mercury meridian meteorites meteoroids meteors mi/sec million minor planets moon moon's Mount Wilson moving nebula Newton's nucleus objects observed Open cluster orbit Palomar Observatories parallax particles period photographs photosphere produced proper motion radial velocity radiation radius regions relative revolution revolve rotation satellites sidereal solar system space spectral lines spectrum speed star's stellar sun's sunspot surface temperature theory tion Uranus Venus visible wavelengths white dwarf Wilson and Palomar