Fourteen Weeks in Descriptive Astronomy |
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Page 45
... paths of some extend a little outside the Zodiac . ) 4. The satellites or moons , eighteen in number , which re- volve around the different planets . 5. Meteors and shooting - stars . 6. Nine comets whose orbits have been computed , and ...
... paths of some extend a little outside the Zodiac . ) 4. The satellites or moons , eighteen in number , which re- volve around the different planets . 5. Meteors and shooting - stars . 6. Nine comets whose orbits have been computed , and ...
Page 56
... path curves toward MARCH . JUNE . SEPTEMBER . Fig . 9 . the north , and sometimes toward the south , as in the figure . This can be explained only on the sup- position that the sun's axis is inclined to the ecliptic ( 7 ° 15 ' ) . The ...
... path curves toward MARCH . JUNE . SEPTEMBER . Fig . 9 . the north , and sometimes toward the south , as in the figure . This can be explained only on the sup- position that the sun's axis is inclined to the ecliptic ( 7 ° 15 ' ) . The ...
Page 66
... paths round the sun - not , however , differing greatly from circles . 3. Their orbits are more or less inclined to the ... path . 4. They are opaque bodies like the earth , and shine by reflecting the light they receive from the sun . 5 ...
... paths round the sun - not , however , differing greatly from circles . 3. Their orbits are more or less inclined to the ... path . 4. They are opaque bodies like the earth , and shine by reflecting the light they receive from the sun . 5 ...
Page 106
... path about the sun at a 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 ...
... path about the sun at a 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 ...
Page 108
... path of the sun through the heavens . - We have spoken of the diurnal motion of the sun . We now speak of its second apparent motion - its yearly path among the stars . * If we look at the accom- * This yearly movement of the sun among ...
... path of the sun through the heavens . - We have spoken of the diurnal motion of the sun . We now speak of its second apparent motion - its yearly path among the stars . * If we look at the accom- * This yearly movement of the sun among ...
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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