Fourteen Weeks in Descriptive Astronomy |
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Page 279
... tors as " Cape Clouds . " Sir John Herschel describes them as consisting of swarms of stars , clusters , and nebulę , seemingly grouped together in the wildest confusion . In the larger , he found 582 single NEBULE . 279.
... tors as " Cape Clouds . " Sir John Herschel describes them as consisting of swarms of stars , clusters , and nebulę , seemingly grouped together in the wildest confusion . In the larger , he found 582 single NEBULE . 279.
Page 291
... describe , with compasses , a circle of eight or ten inches in diameter . Take a piece of heavy wire , six or eight inches in length , one end of which is sharpened . Drive this perpendicularly into the cen- tre of the circle , leaving ...
... describe , with compasses , a circle of eight or ten inches in diameter . Take a piece of heavy wire , six or eight inches in length , one end of which is sharpened . Drive this perpendicularly into the cen- tre of the circle , leaving ...
Page 316
... Describe that method ( p . 309 ) . Show how the movements of the planets puzzled the ancients . What was the theory of " cycles and epicycles ? " 21. Did the ancients believe in the reality of this cumbrous machinery ? Did this theory ...
... Describe that method ( p . 309 ) . Show how the movements of the planets puzzled the ancients . What was the theory of " cycles and epicycles ? " 21. Did the ancients believe in the reality of this cumbrous machinery ? Did this theory ...
Page 318
... Describe the constitution of the sun according to Wil- son's theory . How are the spots produced ? The faculę ? 63. The penumbra ? The umbra ? 64. What is Kirchhoff's theory ? How are the spots pro- duced ? The umbra ? The penumbra ...
... Describe the constitution of the sun according to Wil- son's theory . How are the spots produced ? The faculę ? 63. The penumbra ? The umbra ? 64. What is Kirchhoff's theory ? How are the spots pro- duced ? The umbra ? The penumbra ...
Page 319
... 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 ? 85. What is the peculiarity of its orbit ? Its ...
... 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 ? 85. What is the peculiarity of its orbit ? Its ...
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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