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Updated: May 17, 2025
A comprehensive theory of the moon's origin should render an account of the eccentricity of the moon's orbit; it must also involve the obliquity of the ecliptic, the inclination of the moon's orbit, and the direction of the moon's axis.
Laplace found that if it were not for this cause, the obliquity of the ecliptic would oscillate to the extent of 4° 53' 33" on each side of a mean value, but that when the movements of both planes are taken into account, the extent of oscillation is reduced to 1° 33' 45". Variation of the length of the tropical year.
Corresponding to the unique position occupied by the superior triad Anu, Bel, and Ea in the theological system, a special place was assigned to them in the astronomical system. Anu is the pole star of the ecliptic, Bel the pole star of the equator, while Ea in the southern heavens was identified, according to Jensen, with a star in the constellation Argo.
The sidereal world presented itself to him as a hierarchy of systems, starting from the planetary scheme, rising to throngs of suns within the circuit of the Milky Way the "ecliptic of the stars," as he phrased it expanding to include groups of many Milky Ways; these again combining to form the unit of a higher order of assemblage, and so onwards and upwards until the mind reels and sinks before the immensity of the contemplated creations.
"Meteoric swarms still too numerous for safe travel along the scheduled route," came promptly from the speaker. "You must stay further away from the plane of the ecliptic. The ether will be clear for you along route E2-P6-W41-K3-R19-S7-M14. You will hold a constant acceleration of 981.27 centimeters between initial and final check stations.
Hipparchus framed a catalogue of the stars, and determined their places with reference to the ecliptic, by their latitudes and longitudes. Altogether, he seems to have been one of the greatest geniuses of antiquity, and his works imply a prodigious amount of calculation. Astronomy made no progress for three hundred years, although it was expounded by improved methods.
Honored Majesty-Papa, why not! "Tush, child, you do not understand. In these tremendous circumstances, the celestial Sign of the BALANCE just about canting, and the Obliquity of the Ecliptic like to alter, how can one think of little marriages? Wait till the Obliquity of the Ecliptic come steadily to its old pitch!"
The course that the sun took on the ecliptic was determined, and the ecliptic itself served as the guide for determining the position and movements of the stars.
Empedocles attributed its state of rest to centrifugal force by the rapid circular movement of the heavens, as water is stationary in a pail when whirled round by a string. Democritus further supposed that the inclination of the flat earth to the ecliptic was due to the greater weight of the southern parts owing to the exuberant vegetation.
The sun Weald burned huge and terrible in space. It was close, now. Its disk covered half a degree of arc. "Very neat," observed Calhoun. "Weald Three is our port, Murgatroyd. The plane of the ecliptic would be ... Hm...." He swung the outside electron telescope, picked up a nearby bright object, enlarged its image to show details, and checked it against the local star-pilot.
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