Chapter 19

The flashcards below were created by user eboustead on FreezingBlue Flashcards.

  1. dawrf planets
    the family of icy worlds that orbit beyond Neptune in our solar system
  2. Plutinos
    Icy Kuiper belt objects that, like Pluto, are caught in a 3:2 orbital resonance with Neptune
  3. Widmanstatten pattern
    the bands in iron meterorites that appear because of the presence of large crystals of nickel-iron alloys
  4. chondrite
    a stony meteorite that contains chondrules
  5. chondrule
    a round, glassy body found in some stony meteorites. Chondrules are believed to have solidified very quickly from molten drops of silicate material
  6. meteor shower
    a multitude of meteors that appear to come from the same region of the sky and are believed to be caused by comet debris
  7. s-type asteroids
    rockey asteroids believed to be fragments from the crust and mantle
  8. M-type asteroids
    asteroids believed to be fragments form the metallic cores of differentiated asteroids
  9. C-type asteroids
    asteroids that are plentiful in carbon compounds and are more common in the outer asteroid belt
  10. Oort Cloud
    • a swarm of icy bodies believed to lie in a spherical shell extending to 100,000 AU from the sun.
    • Scientists have advanced the hypothesis that this region is the source of long period comets
  11. gas tail (type I)
    a comet tail composed of ionized gas atoms released from the nucleus and carried outward by the solar wind
  12. dust tail (type II)
    a comet tail composed of dust released from the nucleus and pushed away by the pressure of sunlight
  13. coma
    the glowing head of a comet
  14. sublimation
    the process of a solid going directly to a gas without becomiing a liquid first
  15. Kuiper belt
    the collection of icy planetesimals believed to orbit in a region from just beyond neptune out to 100AU or more
Card Set:
Chapter 19
2012-04-20 02:27:58
ASTR 205

Solar System Debris- Key terms and concepts
Show Answers: