All About asteroids
Table of contents Introduction...................................3 What are asteroids........................4 The structure.................................5 History...........................................6 Dangers asteroids.........................7 Glossary........................................8 Cited sources.................................9 About the author...........................10
Introduction Have you ever wondered how an asteroid looks like. Or like what is it made of. Did you know asteroids are made out of little parts of planets or metal and it is hold together by gravity. And you will find more about asteroids when you read this book. I hope you enjoy it
What are asteroids Small rocky bodies that orbit the sun. Large numbers of these, ranging
What do They do The majority of known asteroids orbit within mars and Jupiter. It means they are rotating around the sun
nearly in size of 600 miles
at a given distance and
or 1,000 km going across
speed. Sometimes the
dust found between the
asteroids hit each other.
orbit of mars and Jupiter
There are also groups of
some have more eccentric
asteroids like the Trojan
orbits and few pass earth
asteroids which are a
or some enter the
population that share and
atmosphere as meteors
orbit with a larger planet or
Asteroids are giant rocks
a moon.
in our solar system
The structure
What are asteroids made out of?
Sizes of asteroids
Asteroids are made out of different materials
The average of an asteroid is no bigger
and substance. Their composition depends
then a house but there are millions that
which planet that they originated. The asteroids
are as big as football fields the smallest
that are nearest to the sun are made out of
asteroid that we can detect are the size
carbon. The asteroids that are further from the
of boulders. And most asteroids orbit
sun are made out of silicate rock. The metallic
somewhere between mars and Jupiter
asteroids are composed up to 80% iron and
in the main belt. There are uncounted
20% of mixture of nickel, iridium, palladium,
millions of small asteroids. An asteroid
platinum, gold and other precious metals.
is anything greater that 10 meters
There are a few asteroids made out of half
across that orbits the sun.
silicate and half metallic.
History Discovering asteroids
Where do asteroids come from
The first asteroid to be discovered was Ceres it was found in 1801 by
Most scientists agree that all the asteroids
Giuseppe Piazza, it was originally
are the result of a big bang, the creation of
considered to be a new planet.
the universe. After the initial big bang, the
Up until the 1980s asteroids catalogued
large asteroids colloid together and planets
were discovered accidentally on
and dwarf planets were formed. It is
telescopes photomatic plates, and they
generally believed that about 3.8 billion
showed up as small streak. Asteroids
years ago most of the planetesimals within
are discovered by telescopes and by
the solar system had either been ejected
stale lights that are in space. The stale
from the solar system entirely.
lights can spot an asteroid or track when ones coming
The asteroids orbit
Dangers asteroids why do they explode How do asteroids come to earth? The gravity of the sun pulls the asteroids into earth but sometimes
Kinetic energy is released due to velocity/mass of the object interacting with the
the asteroids misses. Asteroids come to earth at a amazing speed. And it comes very fast hurdling past earth and then if the asteroids are close enough to earth the gravity can pull it into earth, but while it is getting
friction. This energy is so vast given the velocities of asteroids it is released as heat and light. Faster the
pulled down to earth it might get
object the greater the mass
burned up in the atmosphere or crash
and greater the friction= one
into earth.
massive explosion.
Glossary Crater: a deep wide hole on a surface Astronomers: a scientist who studies the stars, planets and space Metallic: many metals Silicate: salt that contains both silicon and oxygen Iridium: Palladium: a rare metal Platinum: type of sliver Detect: discover or identify something Kinetic: Velocity: Velocities: Initial:
Cited sources
Images
Websites
http://www.redorbit.com/media/uploads/2013/10/asteroid-
"What Are Asteroids Made Of?" Universe Today RSS. N.p.,
thinkstock-137584811-617x416.jpg
n.d. Web. 07 Jan. 2014. <http://www.universetoday.com/
http://airandspace.si.edu/exhibitions/exploring-the-planets/online/asteroids/
37425/what-are-asteroids-made-of/>.
h-astl.jpg
http://wiki.answers.com/Q/Why_do_asteroids_explode?
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#slide=3
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"Asteroid." Wikipedia. Wikimedia Foundation, 01 May 2014. Web. 10 Jan. 2014. <http://en.wikipedia.org/wiki/ Asteroid>.
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"Asteroid." Wikipedia. Wikimedia Foundation, 01 Nov. 2014. Web. 13 Jan. 2014. <http:// en.wikipedia.org/wiki/Asteroid>.
q=tbn:ANd9GcR4taX4jdCAMjSj-
"Asteroid." Wikipedia. Wikimedia Foundation, 01 Nov. 2014. Web. 13 Jan. 2014. <http:// en.wikipedia.org/wiki/Asteroid>.
http://d1jqu7g1y74ds1.cloudfront.net/wp-content/uploads/2008/11/
"Universtoday.com." Universtoday.com. N.p., n.d. Web. 13 Jan. 2014. <http://www.universtoday.com/ 37532/where-do-asteroids-come-from/>. Books Simon, Seymour. Comets, Meteors, and Asteroids. New York: Morrow Junior, 1994. Print.
https://encrypted-tbn0.gstatic.com/images?
BV82-8wZjIon8VMkWN3Kj7BNEvVZczSYoVd
barringer-meteorite-crater.jpg http://ase.tufts.edu/cosmos/pictures/Chapter13/Fig13_14.jpg https://encrypted-tbn3.gstatic.com/images? q=tbn:ANd9GcQFsFv5V5ovmj55KcX_9O9VDkkd_qPN2dOoH5EzX0zN14CHVHgCA http://upload.wikimedia.org/wikipedia/commons/f/f3/ InnerSolarSystem-en.png Images
About the author
Hi my name is Jennifer and I like to play soccer and rugby I also like running. In my family there are 4 people my mom, dad, brother, and me. I have two cats and two hamster. My favorite color is black
Thank you for Reading