Fourteen Weeks in Descriptive Astronomy |
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Page 58
... spot through his telescope , he turned away for a moment , and on looking back it was gone . The appearance of the spots is periodical . — It is a re- markable fact that the number of spots increases and diminishes through a regular ...
... spot through his telescope , he turned away for a moment , and on looking back it was gone . The appearance of the spots is periodical . — It is a re- markable fact that the number of spots increases and diminishes through a regular ...
Page 59
... spots do not influence the fruitfulness of the sea- son . -Sir W. Herschel first advanced the idea that years of abundant spots would be years also of plen- tiful harvest . This is not now generally received . What two years could be ...
... spots do not influence the fruitfulness of the sea- son . -Sir W. Herschel first advanced the idea that years of abundant spots would be years also of plen- tiful harvest . This is not now generally received . What two years could be ...
Page 317
... spots ? What were formerly the views of astronomers with regard to the sun's face ? When were the spots discovered ? 52. Tell something about the number of the spots . Their location . Size . 53. Describe the parts of which they are ...
... spots ? What were formerly the views of astronomers with regard to the sun's face ? When were the spots discovered ? 52. Tell something about the number of the spots . Their location . Size . 53. Describe the parts of which they are ...
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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