E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Hercules (3 syl.),
in astronomy, a large northern constellation.
Those stars in the neighbourhood of Hercules are mostly found to be approaching the earth, and those which lie in the opposite direction to be receding from it.Newcomb: Popular Astronomy, part iv. chap. i. p. 458.