Science Chapter 9

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Science Chapter 9
2014-03-05 21:48:19
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  1. Milky Way
    The Galaxy in which humans reside and is the galaxy of our solar system. It is visible in our night sky as a white large band of stars.
  2. Galaxy
    A large collection of stars, gas, and dust which are spread throughout the universe with 100 Billion galaxies. Usually with a black hole in the centre. There can be eleptical, spiral, and irregular galaxies.
  3. Star Cluster
    A lesser grouping of stars that from from a nebula on the outer arms of a spiral galaxy.
  4. Globular Cluster
    A cluster of 100,000 to a million closely packed stars which are near the centre of the Milky Way Galaxy.
  5. Local Group
    The supercluster of galaxies that our galaxy and the surrounding galaxies such as the Andromeda Galaxy belong to.
  6. Supercluster
    A cluster of close galaxies.
  7. Shapes Of Galaxies
    The shape in which a galaxy looks like. Can be A Spiral Galaxy, Elliptical or Irregular galaxy.
  8. Cosmology
    The study of the universe as a whole and the evolution and beginnings of the universe.
  9. Doppler Effect
    The change with effects the frequency of the wave to the observer. With sound and light as the object travels away the waves become lengthened and become redshifted and when the object travels towards the observer the waves become compressed and blueshifted. This is called the Doppler Effect.
  10. Redshift
    A shift in the spectrum of an object moving away from the observer causing the wavelength to get lengthened and shifted to the red side of the spectrum.
  11. Blueshift
    A shift in the spectrum of an object moving towards the observer causing the wavelength to get compressed and shifted to the blue side of the spectrum.
  12. Big Bang
    The explosion which is theorized to be the origin of the universe.
  13. Cosmic Microwave Background
    The cooled remnants of the big bang that fills the entire universe with an average temperature of 2.725 Kelvin. It has been observed by the COBE and WMAP satellites.
  14. Dark Matter
    Matter theorized to make 23% of matter in the Universe. This matter is not detectable by telescopes and is only known by the effects it causes.
  15. Dark Energy
    A form of energy not visible to telescopes that is theorized to make up 73 percent of the Universe. Dark energy makes up for the expansion of the universe and is theorized to be everywhere in the Universe.