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Transcript
A gas planet that's off in the distance,
Only recently they found my rings in existence.
I'm blue and cold and far away,
People say I'm funny because I spin sideways.
Which planet am I?
WARM-UP # 2 – Why is pluto no loner a planet?
Page 14 in your notebook
1 Comets
–A comet is a
“dirty snowball”
about the size of
an earth
mountain. (dirt
and ice)
2 Structure of a Comet
• Nucleus
– 10 km “Dirty Snowball”
• Coma
– Cloud of evaporated ices and ions
– may be 100,000 km in diameter
• Tail
– Always points away from Sun
• Solar Wind and Radiation Pressure
3 Comet Diagram
Ion Tail
Dust
Tail
Coma
To Sun
4 Comets
–Comets’ orbits are
usually very long, narrow
ellipses.
– They produce tails of gas
and dust when they
approach the sun.
5 Halley’s Comet….
Orbits every 76 years
Halley’s Comet Orbit…
next seen in 2062
6 Asteroids
• Asteroids are small, rocky worlds.
• Most asteroids revolve around the
sun between the orbits of Mars
and Jupiter. (asteroid belt)
• WRITE in also known as planetoid
7
Meteoroid
•
A meteoroid is a chunk of rock,
metal, or dust in space.
8 A Meteor: “A shooting star”
Shooting stars are
not actually stars.
These flashes of light
across the sky are
small bits of rock
burning up in the
Earth’s Atmosphere.
9
Meteorite
Meteoroids that survive as they
pass through the atmosphere
and hit Earth’s surface are
called meteorites.
Barringer Meteor Crater, Arizona
A meteorite can make a hole, or crater, in
the ground when it hits it. The larger the
meteorite, the bigger the hole.
SUMMARY
METEOROID: A piece of stone or metal
that travels in outer space.
METEOR: An object from space that
becomes glowing hot when it passes into
Earth's atmosphere.
METEORITE: A piece of stone or metal
from space that falls to Earth's surface.
COMPLETE IN PENCIL!
SOLAR
SYSTEM
Is made of
PLANETS
OTHER
OBJECTS
Which
include
INNER
ASTEROID
BELT
Located
between