Mostly rock and ice. Some have large percentages of metals such as iron and even gold. They are remnants of the creation of our solar system. Chunks of matter that did not collect and combine to form planets.
The Sun, planets, moons, planetoids, asteroids, dust, gas, comets.
The four main groups of asteroids are: C-type (carbonaceous) asteroids, which are the most common and are rich in carbon and other minerals. S-type (silicaceous) asteroids, composed primarily of silicate materials and metals. M-type (metallic) asteroids, which consist mostly of metallic iron and nickel. V-type (vestoids) asteroids, believed to originate from the asteroid Vesta, primarily made up of basaltic rock.
The rings of Saturn consist of ice particles ranging in size from microscopic dust to large boulders. The particles are believed to be remnants of comets, asteroids, or moons that were shattered by collisions with other objects.
The same as all the other galaxies.Black holes, Stars, Planets, Asteroids, Comets and other space material. Maybe even space junk!!
Comets are Comets and Asteroids are Asteroids
the asteroids crashed in Asia have 1000 asteroids
No asteroids have atmospheres.
meteoroids
Stars are tremendously larger than asteroids and do not become asteroids.
You can see asteroids in the sky.
asteroids are a threat to us
asteroids belt