2. Comets
• A comet is like a big
dirty snowball made
out of water,dust and
many different gases.
• A comet can travel up
to 100,000 m.p.h.
• You can see an
asteroid without a
telescope every three
years.
http://www.enchantedlearning.com/Home.html
3. Parts of a Comet
• The three parts of a
comet are the nucleus,
the coma, and the ion
tail.
• The tail of the comet
always points away
from the sun this is
because of the strong
solar winds.
http://www.enchantedlearning.com/subjects/astronomy/comets/
4. Halley’s Comet
• This comet is called
Halley’s comet
because it was
discovered by Sir
Edmund Halley.
• You can see Halley’s
comet every 76 years.
• The tail of Halley’s
comet is 93 million
miles long.
http://www.solar views.com/cap/comet/halley.htm
5. Asteroids
• Asteroids are small
solid objects that orbit
the Sun.
• They are sometimes
called minor planets.
• The Asteroid Belt
located between Mars
and Jupiter is made up
of 5,000 asteroids.
http://www.enchantedlearning.com/subjects/astronomy/asteroids/
6. Temperature
• The average daytime
temperature on an
asteroid is 212 degrees
Fahrenheit.
• The average nighttime
temperature on an
asteroid is –238
degrees Fahrenheit.
http://www.the-solar-system.net/asteroids/asteroids-pictures.html
7. Composition
• Most asteroids are 80
made out of carbon 70
carbon
but, some are made 60
out of other materials 50 metallic
iron
like silicate, metallic, 40
iron/nick
and dark ice. 30 el
20 ice
10
0
8. Interesting Facts
• Asteroids have large
craters on them.
• The really big
asteroids have moons.
• In 1908 a fireball
exploded into Siberia
destroying an ancient
forest and killing a
herd of reindeer.
www.enchantedlearning.com
9. Meteoroids, Meteors, and
Meteorites
• Meteoroids are small
pieces of dust and rock
that are found in space.
• Meteors are meteoroids
that reach the atmosphere.
• Meteorites are meteors
that reach Earth.
http://www.solar views.com/eng/meteor.htm
10. Meteor Showers
• A meteor shower is
when many meteors fall
from the atmosphere on
to Earth.
• The average meteor in a
meteor shower is about
the size of a grain of
sand.
http://co http://comets.amsmeteors.org/meteors
11. The Difference
• This is the difference
between asteroids and
comets.
• They have many
differences but, some
they are also alike in
some ways.
http://www.enchantedlearning.com/subjects/astronomy/activities/venn/cometasteroid/index.shtml
12. Life
• I don’t think people
could live on a comet
right now but, I think
we would be able to in
the future because of
our major
advancements in
technology.
clipart
13. Did You Know?
• Meteors are actually
debris from comets.
• Meteors travel 71
kilometers per second
that’s 2,663 times as fast
as a Randy Johnson
fastball.
http://leonid.arc.nasa.gov/meteor.html
