Fourteen Weeks in Descriptive Astronomy |
From inside the book
Results 1-3 of 47
Page 85
... Mercury revolves upon its axis in about the same time as the earth , so that the length of the Mercurial day is nearly the same as that of the terrestrial one . Though Mercury thus completes a sidereal revolu- tion around the sun in 88 ...
... Mercury revolves upon its axis in about the same time as the earth , so that the length of the Mercurial day is nearly the same as that of the terrestrial one . Though Mercury thus completes a sidereal revolu- tion around the sun in 88 ...
Page 91
... Mercury , we remember , catches up with the earth in 28 days after it reaches the point where it left the earth at the last inferior conjunction . But it takes Venus nearly two and a half revolutions to overtake the earth and come into ...
... Mercury , we remember , catches up with the earth in 28 days after it reaches the point where it left the earth at the last inferior conjunction . But it takes Venus nearly two and a half revolutions to overtake the earth and come into ...
Page 319
... Mercury . 83. MERCURY . - Definition and sign ? Describe the appear- ance of Mercury , and where seen . 84. What was the opinion of the ancients ? The astrolo- gists ? Chemists ? Why is it difficult to see it ? When can we see it best ...
... Mercury . 83. MERCURY . - Definition and sign ? Describe the appear- ance of Mercury , and where seen . 84. What was the opinion of the ancients ? The astrolo- gists ? Chemists ? Why is it difficult to see it ? When can we see it best ...
Other editions - View all
Common terms and phrases
ancients angle aphelion appear astronomers atmosphere axis bright brilliant called Capricornus Cassiopeia Celestial Sphere centre circle color comet conjunction constellation Cor Caroli dark density diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon globe heat heavenly bodies heavens Hercules Herschel horizon inclined inferior inferior conjunction inferior planet Jupiter latitude length light longitude luminous lunar magnitude Mars mean distance measured Mercury meridian meteors miles moon moon's motion move naked eye nearly nebula Neptune night node north pole obliquity observer orbit parallax pass path penumbra perihelion Perseus planet polar position rays revolve Right Ascension ring rotation satellites Saturn seasons seen shadow shine side sidereal sidereal day solar system space spots summer sun's superior planet supposed surface synodic revolution tance Taurus telescope theory tion Uranus Ursa Major varies velocity Venus vernal equinox visible zenith zodiac