Space glossary terms chapter 9 Que cards

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  1. Milky way
    • The galaxy that includes the solar system; appears as a hazy white band in the night sky
  2. Galaxy
    • a huge collection of stars, planets, gas, and dust that is held together by gravity
  3. star cluster
    • a collection of stars held together by gravity
  4. open cluster
    • a collection of 50 to 1000 stars; open clusters appear along the band of the milky way
  5. globular cluster
    • a collection of 100000 to 1 million stars that is arranged in a distinctive spherical shape; globular clusters are around the center of the milky way
  6. local group
    • a small group of about 40 galaxies that include the milky way
  7. super cluster
    • a gigantic cluster of 4 to 25 clusters of galaxies that is hundreds of million of light years in size
  8. shapes of galaxies
    • the galaxies are either spiral (which means it looks like a pinwheel), elliptical (which means it looks like an ellipsoid) or irregular which doesn't follow any of these rules
  9. cosmology
    • the study of the universe
  10. doppler effect
    • the change in pitch of a sound due to the motion of the source relative to an observer; also the change in frequency of a light source due to is motion relative to an observer
  11. redshift
    • the effect in which objects moving away from an observer have their wavelengths lengthened, toward the red end of the visible spectrum
  12. blueshift
    • the effect in which objects moving towards an observer have their wavelengths shortened, toward the blue end of the spectrum
  13. big bang
    • the event that may have triggered the expansion of the universe 14 billion years ago
  14. CMB
    • the radiation left over from the big bang, which fills the universe
  15. Dark matter
    • the most abundant form of matter in the universe; invisible to telescopes
  16. Dark energy
    • a form of energy that makes up nearly 3 quarters of the universe; has the effect of increasing the expansion of the universe

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Space glossary terms chapter 9 Que cards
2014-01-17 16:10:50
Space glossary terms chapter Que cards

Space glossary terms chapter 9 Que cards
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