SOLAR SYSTEM

Detailed explanation-1: -Comets move around the sun in highly elliptical orbital. The gravitational force on the comet due to the Sun is not normal to the comets velocity in general.

Detailed explanation-2: -When a comet’s orbit brings it close to the Sun, it heats up and spews dust and gases into a giant glowing head larger than most planets. The dust and gases form a tail that stretches away from the Sun for millions of miles.

Detailed explanation-3: -The tail is pushed out by the Sun’s solar wind. What keeps the comet in motion and guides its path is the gravity from all the planets and stars it passes.

Detailed explanation-4: -As a comet approaches our Sun, it begins to heat up and the ice begins to sublimate-to change from a solid to a gas with no liquid stage. Some of the dust is left behind as the ice sublimates. It forms a dark, protective crust on the surface of the nucleus and slows the melting.

Detailed explanation-5: -Comet is an icy cosmic ball which orbits the Sun and while coming closer to Sun releases gases.

Detailed explanation-6: -The gravitational force between the Sun and the other components of the solar system such as the planets, asteroids, comets, etc., causes them to revolve around the Sun.