In Hesiod (Theogony, 264) they are the three sons of Uranus and Gaea - Brontes, Steropes and Arges, - storm-gods belonging to the family of the Titans, who furnished Zeus with thunder and lightning out of gratitude for his having released them from Tartarus.
From the blood of Uranus (this feature is common in Red Indian and Egyptian myths) were born furies, giants, ash-nymphs and Aphrodite.
From the motion of the satellites he finds that the mass of Uranus is - T - A o o th of that of the sun, while for the planet Neptune he finds a mass equal to 19 Toth of the sun, agreeing with the value previously found by him from the perturbations of Uranus within o th of its amount.
Here Delambre observed and computed almost uninterruptedly, and in 17 9 0 obtained for his Tables of Uranus the prize offered by the academy of sciences, of which body he was elected a member two years later.
An example of this process is that of the discovery of the planet Neptune: certain perturbations of the orbit of Uranus had been observed, and it was seen that these could be explained on the hypothesis of the existence of a then unknown planet, and this hypothesis was verified by actual observation.
Among his contributions to astronomy may be noted his eleven zonecatalogues of 34,674 stars, his measurements, in 1836-1837, of nebulae and clusters, and his determination of the mass of Uranus from observations of its satellites (Mena.
His researches into the perturbations of Uranus and Neptune (Proc. Amer.
The results of these skilfully conducted observations were published in a memoir on The Uranian and Neptunian Systems. 3 From this research it appears that the orbits of all four satellites of Uranus are sensibly circular, and although no special search was made, he concludes that none of Sir William Herschel's supposed outer satellites can have any real existence.
Then followed the wars between Zeus and the gods he had rescued from the maw of Cronus against the gods of the elder branch, the children of Uranus and Gaea - Heaven and Earth.
In Greek mythology the term was specially applied to the stone supposed to have been swallowed by Cronus (who feared misfortune from his own children) in mistake for his infant son Zeus, for whom it had been substituted by Uranus and Gaea, his wife's parents (Etymologicum Magnum, s.v.).