Orionid Meteor shower

The Orionid meteor shower, usually called Orionids, is associated with Halley's Comet. These are so called because they appear to come from a point called the radiant,which lies in the Orion constellation. Orionids are an annual meteor shower which last for one week in late-October.

The Orionid meteor shower is produced by Halley's Comet, named on astronomer Edmund Halley who calculated its periodicity in 1705.It passes through inner solar system every 76 years.When the comet passes through the solar system,some rock particals break from it due to removal of ice layer of the comet by sun.After the passage of comet,these particles continue on the comet's trajectory and appear as meteors or "falling stars" when they pass through Earth's upper atmosphere.

The Eta Aquariids are other meteor shower which is associated with Halley's Comet.It is visible from mid April to late May every year.It is so named because its
radiant point appears to lie in the constellation Aquarius, near star, Eta Aquarii.

Halley's Comet last appeared in 1986 and will next appear in 2061.