Question

Name the comet which appears after every 76 years:
A) Hallets
B) Meteor
C) Halley’s
D) Pole star

Answer 1

Hint: A comet is a small icy piece of rock that rotates around the star in a solar system. Different comets have different time periods of revolution which depend on the size of their orbits.

Complete step by step answer:
Comets can be classified as cosmic snowballs of frozen gases, rock and dust that orbit the star in a solar system. When they are far away from the sun, they are frozen with ice and other crystals. When a comet comes close to the sun, it is heated up and spews dust and gases into a giant glowing head larger than most planets. We can see this comet trail from the Earth in the sky.
Halley's Comet, designated as 1P/ Halley, is visible from earth every 76 years which is a short period comet. The Halley’s Comet is the only known short period comic that is regularly visible to the naked eye from earth and the only naked comet that can appear twice in a human lifetime.

Thus, the correct choice is option (C).

Note: Comets have an elliptical orbit. They can get as close as Mercury and as far as Pluto in a single orbit in our solar system. The Halley’s Comet last appeared in 1986 and will be visible again in 2061. The radius of Halley’s Comet is roughly 5 kilometres. The pole star is a star and not a piece of rock so it is not a comet. It is though a very bright star that is always visible from the Earth unlike a comet.