SOLAR SYSTEM

Detailed explanation-1: -They consist mainly of iron-nickel metal with small amounts of sulphide and carbide minerals. During the decay of radioactive elements in the early history of the solar system, many asteroids melted and the iron they contained, being dense, sank to the centre to form a metallic core.

Detailed explanation-2: -Psyche, which orbits the sun in the asteroid belt between Mars and Jupiter, is the largest of the M-type asteroids, which are composed chiefly of iron and nickel as opposed to the silicate rocks that make up most other asteroids. But when viewed from Earth, Psyche sends mixed signals about its composition.

Detailed explanation-3: -Asteroids are made mostly of rock-with some composed of clay and silicate-and different metals, mostly nickel and iron. But other materials have been found in asteroids, as well.

Detailed explanation-4: -Some asteroids are hundreds of miles in diameter, but many more are as small as pebbles. Most asteroids are made of different kinds of rocks, but some have clays or metals, such as nickel and iron.