Fourteen Weeks in Descriptive Astronomy |
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Page 90
... distance varies but little , owing to the slight eccentricity of Venus's orbit . Arago relates that Bonaparte , upon repairing to the Luxem- bourg , when the Directory was about ... mean distance from the sun is about 90 THE SOLAR SYSTEM .
... distance varies but little , owing to the slight eccentricity of Venus's orbit . Arago relates that Bonaparte , upon repairing to the Luxem- bourg , when the Directory was about ... mean distance from the sun is about 90 THE SOLAR SYSTEM .
Page 91
Joel Dorman Steele. planets . Her mean distance from the sun is about 66,000,000 miles , which varies at aphelion and peri- helion within the limits of a half million miles against 15,000,000 miles in the case of the former planet . She ...
Joel Dorman Steele. planets . Her mean distance from the sun is about 66,000,000 miles , which varies at aphelion and peri- helion within the limits of a half million miles against 15,000,000 miles in the case of the former planet . She ...
Page 106
... mean distance of 911 million of miles . This path is called the ecliptic ; its eccentricity , which is greater than that of the orbit of Venus , changes about 100.000 per century , so that in time the orbit would become circular , were ...
... mean distance of 911 million of miles . This path is called the ecliptic ; its eccentricity , which is greater than that of the orbit of Venus , changes about 100.000 per century , so that in time the orbit would become circular , were ...
Page 118
... mean duration of the seasons : Seasons . Spring .. Summer .. Days . Seasons . 92.9 Autumn ..93.6 Winter Days . .89.7 ... distance from the horizon . It is 118 THE SOLAR SYSTEM .
... mean duration of the seasons : Seasons . Spring .. Summer .. Days . Seasons . 92.9 Autumn ..93.6 Winter Days . .89.7 ... distance from the horizon . It is 118 THE SOLAR SYSTEM .
Page 132
... mean diameter of both the sun and moon being rather less than 33 ' , it follows that when we see the lower edge of ... distance from us . The dim and hazy appearance of the heavenly bodies when 132 THE SOLAR SYSTEM .
... mean diameter of both the sun and moon being rather less than 33 ' , it follows that when we see the lower edge of ... distance from us . The dim and hazy appearance of the heavenly bodies when 132 THE SOLAR SYSTEM .
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ancients Andromeda angle aphelion appear Aries astronomers atmosphere axis Boötes bright brilliant Canis Minor Capricornus Cassiopeia cause Celestial Sphere centre Cepheus circle color comet conjunction constellation Cor Caroli dark density Describe diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior conjunction inferior planet Jupiter latitude length light luminous lunar Lyra magnitude Mars mean distance Mercury meridian meteors miles moon's motion move naked eye nearly nebula Neptune night node north pole Orion parallax pass path penumbra perihelion Perseus Pisces polar Polaris precession rays revolve ring rising Saturn seasons seen shine side sidereal sidereal day solar day solar system solstice space spots summer sun's surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible winter Zodiac