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The apsides refer to the farthest (2) and nearest (3) points reached by an orbiting planetary body (2 and 3) with respect to a primary, or host, body (1). An apsis (from Ancient Greek ἁψίς (hapsís) 'arch, vault'; pl. apsides / ˈ æ p s ɪ ˌ d iː z / AP-sih-deez) [1] [2] is the farthest or nearest point in the orbit of a planetary body about its primary body.
The ancient Greek astronomer Hipparchus noted the apsidal precession of the Moon's orbit (as the revolution of the Moon's apogee with a period of approximately 8.85 years); [4] it is corrected for in the Antikythera Mechanism (circa 80 BCE) (with the supposed value of 8.88 years per full cycle, correct to within 0.34% of current measurements). [5]
Earth's rotational velocity also varies in a phenomenon known as length-of-day variation. [171] Earth's annual orbit is elliptical rather than circular, and its closest approach to the Sun is called perihelion. In modern times, Earth's perihelion occurs around 3 January, and its aphelion around 4 July.
An Earth god or Earth goddess is a deification of the Earth associated with a figure with chthonic or terrestrial attributes. There are many different Earth goddesses and gods in many different cultures mythology. However, Earth is usually portrayed as a goddess. Earth goddesses are often associated with the chthonic deities of the underworld. [1]
At Aegai there was a very old image of the earth-goddess, and the service was in the hands of a virgin woman. The serpent represented the earth deity and was related to the chthonic oracular cult. This is evident at Delphi. Traditionally the oracle belonged originally to Poseidon and Ge and the serpent Python represents the earth spirit.
The woman's "male child" is a reference to Jesus (Revelation 12:5), since he is destined to "rule all nations with a rod of iron" (Revelation 12:5). The dragon trying to devour the woman's child at the moment of his birth (Revelation 12:4) is a reference to Herod the Great's attempt to kill the infant Jesus (Matthew 2:16). Through his death and ...
The red curve crosses zero at perihelion and aphelion. The 2:3 resonance between the two bodies is highly stable and has been preserved over millions of years. [ 96 ] This prevents their orbits from changing relative to one another, so the two bodies can never pass near each other.
In a fragment of Euripides the Aether of Zeus is the sky-god who is the father of men and gods, and the earth-goddess Ge is the mother of all life. [67] It seems that Io the priestess of Hera at Argos and consort of Zeus, was another form of Hera.