A.  Comet:  dust and rock particles combined with frozen water, methane, and ammonia.
1.  Halley’s comet:  orbits Sun every 76 years.
2.  Oort Cloud:  large group of comets surrounding solar system beyond Pluto.
3.  Amateur astronomers discovered Hale-Bopp in 1995.
4.  Comet structure:  large dirty snowball of frozen rock and ice.
Comets <ul><li>a.  Ice and dust vaporize as comet nears Sun. </li></ul><ul><li>b.  Vaporized material forms bright cloud c...
Comets vaporize and break up after passing close to the Sun several times.  When the nucleus breaks up, pieces spread out....
B. (1.)  Meteoroid :  name given to small pieces of comet when they move through space.
B. (2.)  Meteor :  small meteoroid that burns up in Earth’s atmosphere.
B. (3.) Meteor Showers :  occur when Earth’s orbit passes through a group of meteoroids that enter the atmosphere.
B. (4.)  Meteorite :  meteoroid that strikes Earth.
C.  Asteroid :  rock similar to that which formed planets.
C. (1.)  Most asteroids lie in an asteroid belt located between Mars and Jupiter.
 
Asteroid Info: <ul><li>Jupiter’s gravity may have kept these asteroids from forming a planet. </li></ul><ul><li>some plane...
Near:  The Near Earth Asteroid Rendezvous probe indicates asteroid 433 Eros has been in many collisions over time.
What is a shooting star? <ul><li>It is NOT a star!! </li></ul>
Look Familiar??????
Shooting Star: <ul><li>A meteor that is burning up in the Earth's atmosphere. A.K.A.  a Meteor!! </li></ul>
 
 
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Comets, asteroids, meteors

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Comets, asteroids, meteors

  1. 1. A. Comet: dust and rock particles combined with frozen water, methane, and ammonia.
  2. 2. 1. Halley’s comet: orbits Sun every 76 years.
  3. 3. 2. Oort Cloud: large group of comets surrounding solar system beyond Pluto.
  4. 4. 3. Amateur astronomers discovered Hale-Bopp in 1995.
  5. 5. 4. Comet structure: large dirty snowball of frozen rock and ice.
  6. 6. Comets <ul><li>a. Ice and dust vaporize as comet nears Sun. </li></ul><ul><li>b. Vaporized material forms bright cloud called coma around comet nucleus. </li></ul><ul><li>c. Solar wind pushes on gas and dust in the coma, causing the particles to form a tail that always points away from the Sun. </li></ul><ul><li>d. Eventually, most of the ice in the comet’s nucleus vaporizes, leaving only small particles. </li></ul>
  7. 7. Comets vaporize and break up after passing close to the Sun several times. When the nucleus breaks up, pieces spread out. The dust and rock fragments are called Meteoroids .
  8. 8. B. (1.) Meteoroid : name given to small pieces of comet when they move through space.
  9. 9. B. (2.) Meteor : small meteoroid that burns up in Earth’s atmosphere.
  10. 10. B. (3.) Meteor Showers : occur when Earth’s orbit passes through a group of meteoroids that enter the atmosphere.
  11. 11. B. (4.) Meteorite : meteoroid that strikes Earth.
  12. 12. C. Asteroid : rock similar to that which formed planets.
  13. 13. C. (1.) Most asteroids lie in an asteroid belt located between Mars and Jupiter.
  14. 15. Asteroid Info: <ul><li>Jupiter’s gravity may have kept these asteroids from forming a planet. </li></ul><ul><li>some planets’ moons may be asteroids pulled from the asteroid belt. </li></ul><ul><li>asteroid sizes range from very tiny to 940 km in diameter. </li></ul>
  15. 16. Near: The Near Earth Asteroid Rendezvous probe indicates asteroid 433 Eros has been in many collisions over time.
  16. 17. What is a shooting star? <ul><li>It is NOT a star!! </li></ul>
  17. 18. Look Familiar??????
  18. 19. Shooting Star: <ul><li>A meteor that is burning up in the Earth's atmosphere. A.K.A. a Meteor!! </li></ul>
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