Halley - Definition
halley
n 1: English astronomer who used Newton's laws of motion to
predict the period of a comet (1656-1742) [syn: Halley,
Edmond Halley, Edmund Halley]
n 1: English astronomer who used Newton's laws of motion to
predict the period of a comet (1656-1742) [syn: Halley,
Edmond Halley, Edmund Halley]