Fourteen Weeks in Descriptive Astronomy |
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Page 36
... half of the sphere is constantly visible to us ; and so far distant are the stars , that we see just as much of the sphere as we would if the upper part of the earth were removed , and we were to stand four thousand miles further away ...
... half of the sphere is constantly visible to us ; and so far distant are the stars , that we see just as much of the sphere as we would if the upper part of the earth were removed , and we were to stand four thousand miles further away ...
Page 48
... half de- gree in diameter , so that 360 disks like the sun , laid side by side , would make a half circle of the celestial sphere . It seems a little larger to us in winter than in summer , as we are 3,000,000 miles nearer it . If we ...
... half de- gree in diameter , so that 360 disks like the sun , laid side by side , would make a half circle of the celestial sphere . It seems a little larger to us in winter than in summer , as we are 3,000,000 miles nearer it . If we ...
Page 57
... half way to either pole requires twenty - eight days . One spot was noticed which had a motion three times greater than that of clouds driven along by the most violent hurricane . Again , immense cyclones occasionally pass over the ...
... half way to either pole requires twenty - eight days . One spot was noticed which had a motion three times greater than that of clouds driven along by the most violent hurricane . Again , immense cyclones occasionally pass over the ...
Page 58
... half an hour . In one case , Sir . W. Herschel relates that when examining a spot through his telescope , he turned away for a moment , and on looking back it was gone . X The appearance of the spots is periodical . — It is a re ...
... half an hour . In one case , Sir . W. Herschel relates that when examining a spot through his telescope , he turned away for a moment , and on looking back it was gone . X The appearance of the spots is periodical . — It is a re ...
Page 66
... half of the orbit lying north and the other south of the earth's path . 4. They are opaque bodies like the earth , and shine by reflecting the light they receive from the sun . 5. They revolve upon their axes in the same way as the ...
... half of the orbit lying north and the other south of the earth's path . 4. They are opaque bodies like the earth , and shine by reflecting the light they receive from the sun . 5. They revolve upon their axes in the same way as the ...
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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