interplanetary bodies. asteroids solid bodies having no atmosphere have well determined orbits more...
TRANSCRIPT
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Interplanetary Bodies
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Asteroids
• Solid bodies having no atmosphere
• Have well determined orbits• More than 2000 in our solar
system
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Asteroids
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Other info:
• Located mostly between Mars and Jupiter
• Can be 600 miles in diameter or as small as a pebble
• All together, the asteroid pieces wouldn’t equal a planet
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• The largest asteroid by far is 1 Ceres. It is 933 km in diameter and contains about 25% of the mass of all the asteroids combined
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Meteoroids
• Chunks of matter that cross paths of the planets
• May hit earth’s atmosphere and burn up. The streaks of light are called meteors. Any chunk that strikes earth is called a meteorite.
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Meteorite
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Meteoroids
• Also called “shooting stars”• In 1992 a football sized meteorite
fell through the trunk of a car in Peekskill, NY
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Meteor Showers
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Impact Craters
• Over 120 impact craters and basins have been found on earth
• Meteor Crater in Arizona formed nearly 50,000 yrs. Ago is 570 feet deep is one of the largest
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Chicxulub Basin
• Mexico’s Yucatan Peninsula• 190 miles wide• Formed when a meteor struck
earth about 65 million years ago
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Yucatan Peninsula
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Comets
• Move in very elliptical orbits around the sun
• Have a solid nucleus covered in ice that produces a cloud that trails behind it as it goes around the sun
• Tail always points away from the sun
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Structure of a Comet
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Comets
• A comet may be visible for weeks at a time
• Ericke’s Comet returns every 33 yrs.• Halley’s Comet returns every 76 yrs.
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Elliptical Orbit of a Comet
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West Comet
West Comet
Halley’s Comet