Fourteen Weeks in Descriptive Astronomy |
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Page 52
They seem to herd together — the length of the straggling group being generally
parallel to the equator. The size of the spots. — It is not uncommon to find a spot
with a surface larger than that of the earth. Schroter measured one more than ...
They seem to herd together — the length of the straggling group being generally
parallel to the equator. The size of the spots. — It is not uncommon to find a spot
with a surface larger than that of the earth. Schroter measured one more than ...
Page 65
In this journey we shall examine each planet in turn, noticing its distance, size,
length of its year, duration of day and night, temperature of the climate, the
number of its moons, and many other interesting facts, showing how much we
can 'mow ...
In this journey we shall examine each planet in turn, noticing its distance, size,
length of its year, duration of day and night, temperature of the climate, the
number of its moons, and many other interesting facts, showing how much we
can 'mow ...
Page 66
Hence they will have the alternation of day and night like the inhabitants of the
earth ; but their days are of different lengths from our own. 6. Agreeably to the
principles of gravitation, their velocity is greatest at those parts of their orbit which
are ...
Hence they will have the alternation of day and night like the inhabitants of the
earth ; but their days are of different lengths from our own. 6. Agreeably to the
principles of gravitation, their velocity is greatest at those parts of their orbit which
are ...
Page 67
... owing, to their great distance from that luminary. 2. The average density of the
first group considerably exceeds that of the second, the approximate ratio being 5
: 1. 3. The mean duration of the axial rotations, or mean length of the day of the ...
... owing, to their great distance from that luminary. 2. The average density of the
first group considerably exceeds that of the second, the approximate ratio being 5
: 1. 3. The mean duration of the axial rotations, or mean length of the day of the ...
Page 85
Mercury receives upon its axis in about the same time as the earth, so that the
length of the Mercurial day is nearly the same as that of the terrestrial one.
Though Mercury thus completes a sidereal revolution around the sun in 88 days,
yet to ...
Mercury receives upon its axis in about the same time as the earth, so that the
length of the Mercurial day is nearly the same as that of the terrestrial one.
Though Mercury thus completes a sidereal revolution around the sun in 88 days,
yet to ...
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Common terms and phrases
ancients aphelion appearance Aries astronomers atmosphere axis bright brilliant Canis Minor Capricornus Cassiopeia cause celestial Celestial Sphere centre Cepheus circle color comet conjunction constellation Cor Caroli dark Describe diameter disk earth east ecliptic equal equator equinoctial figure fixed stars full moon 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 nebulae Neptune night node north pole orbit Orion parallax pass path penumbra perihelion Perseus Pisces planet Polaris precession 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 Zodiac
Popular passages
Page 2 - One God, one law, one element, And one far-off divine event, To which the whole creation moves.
Page 129 - ... while the Earth remaineth seed-time and harvest, and cold and heat, and summer and winter, and day and night shall not cease.
Page 283 - That nothing walks with aimless feet ; That not one life shall be destroyed, Or cast as rubbish to the void, When God hath made the pile complete...
Page 236 - Her nails are sharpen'd into pointed claws, Her hands bear half her weight, and turn to paws ; Her lips, that once could tempt a god, begin To grow distorted in an ugly grin. And...
Page 289 - A solar day is the interval between two successive passages of the sun across the meridian of any place. If the earth were stationary in its orbit, the solar day would be of the same length as the sidereal ; but while the earth is turning around on its axis, it is going forward at the rate a'i 360° in a year, or about 1° per day.
Page 34 - Law of gravitation: Every particle of matter in the universe attracts every other particle with a force varying directly as the product of their masses and inversely as the square of the distance between them.
Page 29 - If you forgive me, I rejoice ; if you are angry, I can bear it. The die is cast, the book is written, to be read either now or by posterity, I care not which. It may well wait a century for a reader, as God has waited six thousand years for an observer.
Page 134 - Were it not for the reflective and scattering power of the atmosphere, no objects would be visible to us out of direct sunshine; every shadow of a passing cloud would be pitchy darkness ; the stars would be visible all day, and every apartment, into which the sun had not direct admission, would be involved in nocturnal obscurity.
Page 192 - We see it as Columbus saw America from the shores of Spain. Its movements have been felt, trembling along the far-reaching line of our analysis, with a certainty hardly inferior to that of ocular demonstration.
Page 31 - Nature, such as the seven metals, &,c., which it were tedious to enumerate, we gather that the number of planets is necessarily seven. Moreover, the satellites are invisible to the naked eye, and therefore can exercise no influence over the earth, and therefore would be useless, and therefore do not exist.
Bibliographic information
| Title | Fourteen Weeks in Descriptive Astronomy Steele's series in the natural sciences |
| Publisher | A.S. Barnes, 1874 |
| Original from | Harvard University |
| Digitized | 4 Mar 2008 |
| Length | 336 pages |
| Export Citation | BiBTeX EndNote RefMan |