Fourteen Weeks in Descriptive Astronomy |
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Page 76
... visible when in superior conjunction , as its light is then lost in the greater brilliancy of the sun . When in inferior conjunction , it sometimes passes in front. Fig . 19 . B ORBIT AND SEASONS OF MERCURY . 76 THE SOLAR SYSTEM .
... visible when in superior conjunction , as its light is then lost in the greater brilliancy of the sun . When in inferior conjunction , it sometimes passes in front. Fig . 19 . B ORBIT AND SEASONS OF MERCURY . 76 THE SOLAR SYSTEM .
Page 89
... visible before sunrise , she was called by the ancients Phosphorus , Lucifer , or the Morning Star , and when she shone in the evening after sunset , Hesperus , Ves- per , or the Evening Star . She presents the same appearances as ...
... visible before sunrise , she was called by the ancients Phosphorus , Lucifer , or the Morning Star , and when she shone in the evening after sunset , Hesperus , Ves- per , or the Evening Star . She presents the same appearances as ...
Page 92
... visible . At this time , however , many observers have noticed the entire contour of the planet to be of a dull gray hue , as seen in the cut . DIMENSIONS . - Venus is about 7,500 miles in diame- ter . The volume of the planet is about ...
... visible . At this time , however , many observers have noticed the entire contour of the planet to be of a dull gray hue , as seen in the cut . DIMENSIONS . - Venus is about 7,500 miles in diame- ter . The volume of the planet is about ...
Page 134
... visible to us out of direct sunshine ; every shadow of a passing cloud would be pitchy dark- ness ; the stars would be visible all day ; no window would admit light except as the sun shone directly through it , and a man would require a ...
... visible to us out of direct sunshine ; every shadow of a passing cloud would be pitchy dark- ness ; the stars would be visible all day ; no window would admit light except as the sun shone directly through it , and a man would require a ...
Page 144
... visible , to behold this wonderful spec- tacle . Those living near the limbs of the disk might , however , on ac- count of the librations , get occasional glimpses of it near their horizon . THE EARTH - SHINE . - For a few days before ...
... visible , to behold this wonderful spec- tacle . Those living near the limbs of the disk might , however , on ac- count of the librations , get occasional glimpses of it near their horizon . THE EARTH - SHINE . - For a few days before ...
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Common terms and phrases
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