EVERYDAY SCIENCE

Detailed explanation-1: -A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighboring region of planetesimals.

Detailed explanation-2: -A planetary satellite is any one of the celestial bodies in orbit around a planet, which is known as the primary body.

Detailed explanation-3: -A planet is a large object that orbits a star. To be a planet, an object must be massive enough for gravity to have squeezed it into a spherical, or round, shape, . It must also be large enough for gravity to have swept up any rocky or icy objects from its path, or orbit, around the star.

Detailed explanation-4: -What are bodies that orbit a star outside our Solar System called? They are: asteroids, comets, stars, meteors and meteorites, planets, artificial and natural satellites.

Detailed explanation-5: -The answer to why the bigger objects are round boils down to the influence of gravity. An object’s gravitational pull will always point towards the centre of its mass. The bigger something is, the more massive it is, and the larger its gravitational pull.