Hal‧ley's com‧et /ˌhæliz ˈkɒmət, ˌheɪl- $ -ˌkɑː-/
a comet (=an object in space like a bright ball with a long tail) that moves around the Sun and passes close to the Earth every 76 years. It was named after the English astronomer Edmund Halley (1656–1742), and it last appeared close to the Earth in 1986.

[TahlilGaran] Dictionary of Contemporary English ▲