What Are Asteroids Made Of?

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** What Are Asteroids Made Of? **

by Jerry Coffey on August 17, 2009

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An artists impression of an asteroid belt(credit: NASA)

An artists impression of an asteroid belt(credit: NASA)

What are asteroids made of? That is a very interesting question and if you
are asking that it shows that you have a very keen and curious mind.
Asteroids are made of different minerals and substances. Their composition
depends on which planet they may have originated from. Many asteroids are
the result of larger asteroids hitting planets or each other during the
fiery beginnings of the Solar System. The chemical reactions that they have
undergone over the millenia also effects their composition. The asteroids
that are nearest the Sun are mostly made of carbon while the ones further
away are made up of silicate rock. The metallic asteroids are composed of
up to 80% iron and 20% a mixture of nickel, iridium, palladium, platinum,
gold, and other precious metals. There are those few that are made up of
half silicate and half metallic.



What are asteroids made of? Well, that depends on which class they are.
There are four major classes of asteroids: C type, D type, S type, and V
type. Each has a different composition and position in the universe.

*C type* are found in the outer areas of the main belt and are darker and
more carbonaceous the the S type.

*S type* are found in the inner area of the main belt, closer to


Source: www.universetoday.com/37425/what-are-asteroids-made-of/


Asteroid - Simple English Wikipedia, the free encyclopedia

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** Asteroid **

From Wikipedia, the free encyclopedia
Jump to: navigation, search
A photo of asteroid (253) Mathilde taken by NEAR

An *asteroid* is a small object in the Solar System that travels around the
Sun. It is like a planet, but smaller. The name "asteroid" means "like a
star" in the ancient Greek language. Asteroids may look like small stars in
the sky, but they really do move around the Sun, while stars only seem to
move because the Earth spins. Like planets, asteroids do not make their own
light. Because of this, some people think "asteroids" is not a good name,
and think that the name "planetoid" ("like a planet") would be a better
name.

Giuseppe Piazzi found the first asteroid, in 1801. It was named Ceres, and
is the biggest object in the asteroid belt. Other asteroids in the asteroid
belt, like Juno, Pallas, and Vesta were found later. Today, astronomers
using computerized telescopes find thousands of asteroids every month,
which range from 1 km (less than a mile) to 600 miles (1000 km) across.

Asteroids are the leftover rock and other material from the formation of
the Solar System. These rocks were too small to make a planet, and could
not collide to form one. Most asteroids are made of rock, but some are made
of carbon or metal. Depending on what's on the surface, they are classified
into various kinds in including Type M (metal), Type S (stone), and Type C
(carbon).

Most asteroids in our Solar System are in the asteroid belt between Mars
and Jupiter. Many are not in the main asteroid belt. The ones that come
close to Earth are called Near Earth Objects (NEO). Many scientists think
asteroids striking the Earth killed


Source: simple.wikipedia.org/wiki/Asteroid

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