Fourteen Weeks in Descriptive Astronomy |
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Page 86
... perihelion . If at inferior conjunction Mer- cury is in aphelion and the earth in perihelion , its distance from us is only 90,000,000 – 43,000,000 : 47,000,000 miles . If at superior conjunction Mer- cury is in aphelion and the earth ...
... perihelion . If at inferior conjunction Mer- cury is in aphelion and the earth in perihelion , its distance from us is only 90,000,000 – 43,000,000 : 47,000,000 miles . If at superior conjunction Mer- cury is in aphelion and the earth ...
Page 88
... perihelion the planet approaches so near the sun that the heat and light are ten times as great as that we receive , while in aphelion it recedes so as to reduce the amount to four and a half times ( the average , however , is seven ...
... perihelion the planet approaches so near the sun that the heat and light are ten times as great as that we receive , while in aphelion it recedes so as to reduce the amount to four and a half times ( the average , however , is seven ...
Page 91
... pupil calculate the distances of the earth and Venus from each other , when in perihelion and aphelion , as in the case of Mercury , ( See tables in Appendix . ) The figure represents its apparent dimensions at the extreme , VENUS . 91.
... pupil calculate the distances of the earth and Venus from each other , when in perihelion and aphelion , as in the case of Mercury , ( See tables in Appendix . ) The figure represents its apparent dimensions at the extreme , VENUS . 91.
Page 111
... Perihelion January AUTUMN- II December ४ November Y October H September -SUMMER- August July 31 December February n WIN TE March ne R R- 22 March Vernal Equinox April May m THE CREIT OF THE EARTH . June SPRING. THE EARTH . 111.
... Perihelion January AUTUMN- II December ४ November Y October H September -SUMMER- August July 31 December February n WIN TE March ne R R- 22 March Vernal Equinox April May m THE CREIT OF THE EARTH . June SPRING. THE EARTH . 111.
Page 116
... perihelion about the 31st of December . It is then nearest the sun , which is therefore said to be in perigee . The sun rises and sets each day further and further north , and climbs up higher in the heavens at midday . Our days ...
... perihelion about the 31st of December . It is then nearest the sun , which is therefore said to be in perigee . The sun rises and sets each day further and further north , and climbs up higher in the heavens at midday . Our days ...
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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