Fourteen Weeks in Descriptive Astronomy |
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Page 36
... the celestial sphere there are imagined to be drawn three systems of circles :
the Horizon, the Equinoctial, and the Ecliptic Systems. Each of these has (1) its
Principal Circle, (2) its Subordinate Circles, (3) its Points, and (4) its
Measurements.
... the celestial sphere there are imagined to be drawn three systems of circles :
the Horizon, the Equinoctial, and the Ecliptic Systems. Each of these has (1) its
Principal Circle, (2) its Subordinate Circles, (3) its Points, and (4) its
Measurements.
Page 38
The Equinoctial System. (a) The Principal Circle is the Equinoctial. This is the
Celestial Equator, or the earth's equator, extended to the Celestial Sphere. (b)
Subordinate Circles. — These are the Hour Circles (Bight Ascension Meridians)
and ...
The Equinoctial System. (a) The Principal Circle is the Equinoctial. This is the
Celestial Equator, or the earth's equator, extended to the Celestial Sphere. (b)
Subordinate Circles. — These are the Hour Circles (Bight Ascension Meridians)
and ...
Page 39
Bight Ascension is distance from the Vernal Equinox, measured on the
equinoctial eastward. E. A. corresponds to terrestrial longitude, and may extend
to 360° East, instead of 180° as on the earth. E. A. is never measured westward.
Bight Ascension is distance from the Vernal Equinox, measured on the
equinoctial eastward. E. A. corresponds to terrestrial longitude, and may extend
to 360° East, instead of 180° as on the earth. E. A. is never measured westward.
Page 40
The Equinoctial System is largely used by modern astronomers, and
accompanies the Equatorial Telescope, Sidereal Clock, and Chronographs of the
best Observatories. III. The Ecliptic System. (a) The Principal Circle is the Ecliptic.
This is ...
The Equinoctial System is largely used by modern astronomers, and
accompanies the Equatorial Telescope, Sidereal Clock, and Chronographs of the
best Observatories. III. The Ecliptic System. (a) The Principal Circle is the Ecliptic.
This is ...
Page 41
The Equinoxes are the points where the ecliptic intersects the equinoctial. The
place where the sun crosses the equinoctial* in going North, which occurs about
the 21st of March, is called the Vernal Equinox. The place where the sun crosses
...
The Equinoxes are the points where the ecliptic intersects the equinoctial. The
place where the sun crosses the equinoctial* in going North, which occurs about
the 21st of March, is called the Vernal Equinox. The place where the sun crosses
...
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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 |