Fourteen Weeks in Descriptive Astronomy |
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Page 9
... Horizon system . ( P. 45 , 173. ) The number of minor planets discovered at this time ( Feb. 1 , 1881 ) is 219 . ( P. 64. ) For the views of various authorities on the constitution of the sun , solar spots , etc. , see Newcomb's ...
... Horizon system . ( P. 45 , 173. ) The number of minor planets discovered at this time ( Feb. 1 , 1881 ) is 219 . ( P. 64. ) For the views of various authorities on the constitution of the sun , solar spots , etc. , see Newcomb's ...
Page 36
... the EQUINOCTIAL , and the ECLIPTIC Systems . Each of these has ( 1 ) its Principal Circle , ( 2 ) its Subordinate Circles , ( 3 ) its Points , and ( 4 ) its Meas- urements . I. THE HORIZON SYSTEM . ( a ) The PRINCIPAL 36 INTRODUCTION .
... the EQUINOCTIAL , and the ECLIPTIC Systems . Each of these has ( 1 ) its Principal Circle , ( 2 ) its Subordinate Circles , ( 3 ) its Points , and ( 4 ) its Meas- urements . I. THE HORIZON SYSTEM . ( a ) The PRINCIPAL 36 INTRODUCTION .
Page 37
... Horizon is the small circle where the earth and sky seem to meet ; it is parallel to the rational horizon , but distant from it the semi - diameter of the earth . No two places have the same sensible horizon : any two on opposite sides ...
... Horizon is the small circle where the earth and sky seem to meet ; it is parallel to the rational horizon , but distant from it the semi - diameter of the earth . No two places have the same sensible horizon : any two on opposite sides ...
Page 38
... horizon , North or South . Altitude is the distance from the horizon , meas- ured on a vertical circle toward the zenith . Zenith distance ( the complement of Altitude ) is the distance from the zenith , measured on a vertical circle ...
... horizon , North or South . Altitude is the distance from the horizon , meas- ured on a vertical circle toward the zenith . Zenith distance ( the complement of Altitude ) is the distance from the zenith , measured on a vertical circle ...
Page 58
... horizon without being confronted by his imperturbable telescope . " Besides this , it has now been found that the activity of the sun's spots goes through another regular period of about 56 years . Independently of this conclusion , it ...
... horizon without being confronted by his imperturbable telescope . " Besides this , it has now been found that the activity of the sun's spots goes through another regular period of about 56 years . Independently of this conclusion , it ...
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ancients Andromeda angle aphelion appearance Aries astronomers atmosphere axis body Boötes bright brilliant Canis Minor Capricornus Cassiopeia celestial centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk Draco earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavens Hercules Herschel horizon inclined inferior inferior conjunction inferior planet Jupiter latitude length light lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon moon's motion move naked eye nearly nebula Neptune node north pole orbit Orion parallax pass path penumbra perihelion Perseus Pisces planet Polaris precession rays revolve ring rising Saturn seasons seen shadow shines shower sidereal sidereal day solar day solar system space spots summer sun's superior planet surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible zodiac