The Urania reference article from the English Wikipedia on 24-Apr-2004
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Urania

In Greek mythology, Urania ("queen of the mountains") was the muse of astronomy and astrology. She was the mother of Linus by Apollo. She is usually depicted as having a globe in her left hand and a peg in the right.

The Nine Muses / Greek Mythology
Calliope | Clio | Erato | Euterpe | Melpomene | Polyhymnia | Terpsichore | Thalia | Urania