Fourteen Weeks in Descriptive Astronomy |
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Page 17
He introduced the division of the earth's surface into zones, and the theory of the
obliquity of the ecliptic. He also predicted an eclipse of the sun which is
memorable in ancient history as having terminated a war between the Medes
and ...
He introduced the division of the earth's surface into zones, and the theory of the
obliquity of the ecliptic. He also predicted an eclipse of the sun which is
memorable in ancient history as having terminated a war between the Medes
and ...
Page 33
He knew (according to the measurement then received) that a body on the
surface of the earth is four thousand miles from the centre. He applied this
imaginary law. Suppose it is removed four thousand miles from the surface of the
earth, ...
He knew (according to the measurement then received) that a body on the
surface of the earth is four thousand miles from the centre. He applied this
imaginary law. Suppose it is removed four thousand miles from the surface of the
earth, ...
Page 36
... as we would if the upper part of the earth were removed, and we were to stand
four thousand miles further away, or at the very centre of ^the earth, where our
view Would be bounded by a great circle of the earth. On the concave surface ...
... as we would if the upper part of the earth were removed, and we were to stand
four thousand miles further away, or at the very centre of ^the earth, where our
view Would be bounded by a great circle of the earth. On the concave surface ...
Page 47
... as intense as it is at the surface of the sun. Moreover, the heat and light stream
off into space equally in every direction. Of this vast flood only one twenty-three
hundred millionth part reaches the earth. It is said that if the heat of the sun were
...
... as intense as it is at the surface of the sun. Moreover, the heat and light stream
off into space equally in every direction. Of this vast flood only one twenty-three
hundred millionth part reaches the earth. It is said that if the heat of the sun were
...
Page 48
If we represent the luminous surface of the sun when at its average (mean)
distance by 1000, the same surface will be represented to us when in aphelion (
July) by 940, and when in perihelion (January) by 1072. Dimensions. — Its
diameter is ...
If we represent the luminous surface of the sun when at its average (mean)
distance by 1000, the same surface will be represented to us when in aphelion (
July) by 940, and when in perihelion (January) by 1072. Dimensions. — Its
diameter is ...
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Common terms and phrases
ancients angle aphelion appear Aries astronomers atmosphere axis bright brilliant Canis Minor Capricornus Cassiopeia cause celestial 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 globe heat heavenly bodies heavens Herschel horizon inclined inferior 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 node north pole orbit Orion parallax pass path penumbra perihelion Perseus Pisces planet polar Polaris rays revolve ring rising Saturn seasons seen shine side sidereal sidereal day solar day solar system solstice space sphere spots summer sun's surface synodic revolution tance Taurus telescope theory tion umbra Uranus Ursa Major Ursa Minor varies velocity Venus vernal equinox visible winter zenith Zodiac
Bibliographic information
| Title | Fourteen Weeks in Descriptive Astronomy Fourteen weeks courses in natural science |
| Author | Joel Dorman Steele |
| Publisher | A.S. Barnes & Company, 1873 |
| Original from | the University of California |
| Digitized | 14 Oct 2010 |
| Length | 336 pages |
| Export Citation | BiBTeX EndNote RefMan |