Comets and Meteors-Topic 2

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What is the difference between the orbit of comets and plants?
Comets have vary elliptical orbits as planets orbits are only slightly elliptical.
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Where is the Kuiper Belt and what is its nature?
It is located beyond Neptune and is like the asteroid belt.
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Where is the oort cloud located?
Around 100 AU away from the sun
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Where do long and short period comets com from?
Short: Kuiper Belt, Long: Theoretical oort cloud
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When do the tails of comets from?
When close to the sun
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What are the 2 tails called?
Ion tail and dust tail
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Which way do the 2 tails point?
Ion tail point away from the sun and the dust tail follows the curve of the orbital path.
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What causes the 2 tails to form?
Solar wind
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What are meteoroids?
Objects floating around the solar system
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Where are meteoroids origins?
Impacts on mars and the moon, collisions between asteroids, dust tails of comets.
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What are meteors?
'Shooting stars'-meteoroids burning up in Earth's atmosphere.
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When are meteors fireballs?
If they have a magnitude greater than -3.
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What are Meteorites?
Meteorites that don't fully burn up and collide with Earth.
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What causes meteor showers?
The Earth travelling through the wake of a comet.
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What is the point called where the meteors appear to all be coming from?
Point of radience
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What does PHO stand for?
Potentially Hazardous object
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Where do PHOs orbit?
Less than 7.5 million km from Earth
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Why do we have to monitor PHOs?
May cause a Tsunami if they land in the ocean or major destruction and deaths if on land.
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Evidence of impacts between bodies in the solar system.
Craters of the moon and Earth and other planets. Uranus' axis tilt is believed to be due to a collision with an asteroid.
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Card 2

Front

Where is the Kuiper Belt and what is its nature?

Back

It is located beyond Neptune and is like the asteroid belt.

Card 3

Front

Where is the oort cloud located?

Back

Preview of the front of card 3

Card 4

Front

Where do long and short period comets com from?

Back

Preview of the front of card 4

Card 5

Front

When do the tails of comets from?

Back

Preview of the front of card 5
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