Fourteen Weeks in Descriptive Astronomy |
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Page 38
(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 Declination
Parallels.
(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 Declination
Parallels.
Page 40
It is inclined to the equinoctial 23° 28', which measures the inclination of the
Earth's Equator to its orbit, and is called the obliquity of the ecliptic. . (b) The
Subordinate Circles are Circles of Celestial Longitude, the Colures, and Parallels
of ...
It is inclined to the equinoctial 23° 28', which measures the inclination of the
Earth's Equator to its orbit, and is called the obliquity of the ecliptic. . (b) The
Subordinate Circles are Circles of Celestial Longitude, the Colures, and Parallels
of ...
Page 41
The Solstices are the two points of the ecliptic most distant from the Equator; or
they may be considered to mark the sun's furthest declination, North and South of
the equinoctial. The Summer Solstice occurs about the 22d of June ; the Winter ...
The Solstices are the two points of the ecliptic most distant from the Equator; or
they may be considered to mark the sun's furthest declination, North and South of
the equinoctial. The Summer Solstice occurs about the 22d of June ; the Winter ...
Page 50
However, a man weighing at the earth's equator 150 lbs., at the sun's equator
would weigh about 4,080 lbs., — a force of attraction that would inevitably and
instantly crush him. At the earth's equator a stone falls 16 feet the first second ; at
the ...
However, a man weighing at the earth's equator 150 lbs., at the sun's equator
would weigh about 4,080 lbs., — a force of attraction that would inevitably and
instantly crush him. At the earth's equator a stone falls 16 feet the first second ; at
the ...
Page 52
They are found in two belts, one on each side of the equator, within not less than
8° nor more than 35° of latitude. They seem to herd together — the length of the
straggling group being generally parallel to the equator. The size of the spots.
They are found in two belts, one on each side of the equator, within not less than
8° nor more than 35° of latitude. They seem to herd together — the length of the
straggling group being generally parallel to the equator. The size of the spots.
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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 |