Definitions for "Halley"
The most famous periodic comet. Its aphelion is beyond the orbit of Neptune, but it returns to the inner Solar System every 76 years. Named after the 17th century British scientist, Edmond Halley, who first recognised its regular pattern of reappearances. Studied by a fleet of spacecraft during its 1986 apparition, including ESA's Giotto.
Edmond Halley (1656-1742) English astronomer. In 1758, predicted accurately the return of a comet previously observed in 1531, 1607, 1682. The body was subsequently named Halley's Comet.
English astronomer who used Newton's laws of motion to predict the period of a comet (1656-1742)
Halley is a lunar impact crater that is intruding into the southern wall of the Hipparchus walled-plain. To the southwest of Halley is the large Albategnius crater, and due east lies the slightly smaller Hind crater.