GENERAL KNOWLEDGE

Detailed explanation-1: -Meteoroids are lumps of rock or iron that orbit the sun, just as planets, asteroids, and comets do. Meteoroids, especially the tiny particles called micrometeoroids, are extremely common throughout the solar system.

Detailed explanation-2: -Asteroids Asteroids are rocky, airless worlds that orbit our Sun. They are remnants left over from the formation of our solar system, ranging in size from the length of a car to about as wide as a large city.

Detailed explanation-3: -The asteroid belt is a torus-shaped region in the Solar System, centered on the Sun and roughly spanning the space between the orbits of the planets Jupiter and Mars. It contains a great many solid, irregularly shaped bodies called asteroids or minor planets.

Detailed explanation-4: -The number of 1km asteroids that would make an object as large as Earth is simply the ratio between the volume of the Earth and the volume of a single asteroid: VE V = 1.087 × 1012 km3 0.524 km3 = 2.074 × 1012. It would take about two trillion asteroids to form an object with the volume of the Earth!