Georgium Sidus en · PROPN
Etymology
Learned borrowing from Latin Geōrgium Sīdus. Coined by German-born British astronomer and composer William Herschel in 1781, after King George III.
Meanings
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(obsolete) The planet Uranus.
The satellites of the Georgium Sidus, too, appear to move nearly at right angles to the plane of his orbit […]
1821, James Ferguson, Astronomy, volume II, page 86:The exclusion from the courts of the malign influence of all authorities after the Georgium sidus became ascendant, would uncanonize Blackstone.
1812, Thomas Jefferson, letter, 17 JuneI cannot but wish to take this opportunity of expressing my sense of gratitude, by giving the name Georgium Sidus […] to a star, which (with respect to us) first began to shine under His auspicious reign.
1783, William Herschel, Philosophical transactions of the Royal Society of London, section 73.2: