comets, asteroids, and meteors oh
TRANSCRIPT
Warm Up – Page 202
• Copy today’s date and EQ on page 203. Then answer on the EQ on page 202.
Comets
• Definition: chunks of ice and dust that usually has a long, narrow elliptical orbit
• Comet means long haired star
Comets probably come from two areas of the Solar System:
1. The Kuiper belt – found just outside the orbit of Neptune. (home of short period comets) like Halley’s Comet.
2.The Oort Cloud found outside Pluto’s orbit. (Home of long period comets)
1 AU= about 93 million miles
http://www.solarviews.com/cap/comet/kuiper3.htm
NASA
NASA
Comet animation
NASA
Comet
• 3 parts:– Nucleus
– Coma
– Tail: always points away from sun
Nucleus and coma make up the head .
Comet
Famous Comets
Hale- Bopp
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Comet Hyakutake
1996
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Asteroids
• Definition: objects that are too small and numerous to be considered planets
• Very rocky
Asteroid Belt
The region between the orbits of Mars and Jupiter, where many asteroids are found.
Asteroids…
More Asteroid Belt…
NASA
Movie of close-up
NASA
Meteors
• 3 types:
• Meteor: a streak of light in the sky produced by the burning of a meteoroid in Earth’s atmosphere
• Meteoroid: a chunk of rock or dust in space
• Meteorite: a meteoroid that has hit Earth’s surface
NASA
http://www.mnh.si.edu/
Meteorite crater in Canada
One of the best places to look for meteorites is Antarctica!
NASA
NASA
NASA
NASA
Meteors…
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