Fourteen Weeks in Descriptive Astronomy |
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Page 76
... 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 .
... 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 86
... SEASONS . AS Mercury's axis is much inclined from a perpendicular , its seasons are peculiar . There are no distinct frigid zones ; but large re- gions near the poles have six weeks continuous day and torrid heat , alternating with a ...
... SEASONS . AS Mercury's axis is much inclined from a perpendicular , its seasons are peculiar . There are no distinct frigid zones ; but large re- gions near the poles have six weeks continuous day and torrid heat , alternating with a ...
Page 87
... year , or eight times during the terrestrial one . An inhabitant of Mercury must be accustomed to the most sudden and vio- lent. ORBIT AND SEASONS OF MERCURY . EXTREME , MEAN , AND LEAST APPARENT SIZE OF VENUS. MERCURY . 87.
... year , or eight times during the terrestrial one . An inhabitant of Mercury must be accustomed to the most sudden and vio- lent. ORBIT AND SEASONS OF MERCURY . EXTREME , MEAN , AND LEAST APPARENT SIZE OF VENUS. MERCURY . 87.
Page 93
... SEASONS . As the axis of Venus is very much in- clined from a perpendicular , its seasons are similar to those of Mercury . The torrid and temperate Fig . 25 Plane of the rotation Axis of Planets orbit zones overlap each other ; the ...
... SEASONS . As the axis of Venus is very much in- clined from a perpendicular , its seasons are similar to those of Mercury . The torrid and temperate Fig . 25 Plane of the rotation Axis of Planets orbit zones overlap each other ; the ...
Page 94
... seasons . If the inclination of its axis is 75 ° , as some as- tronomers hold , its tropics must be 75 ° from the equator , and its polar circles 75 ° from the poles . The torrid zone is , therefore , 150 ° in width . The torrid and ...
... seasons . If the inclination of its axis is 75 ° , as some as- tronomers hold , its tropics must be 75 ° from the equator , and its polar circles 75 ° from the poles . The torrid zone is , therefore , 150 ° in width . The torrid and ...
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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