Galaxies and the Big Bang! Aurora HS, Ohio Geoscience

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Across
  1. 1. an explanation for some phenomenon that is based on observation, experimentation, and reasoning: that is supported by a large quantity of evidence: and does not conflict with any existing experimental results or observations
  2. 5. most of the universe is composed of this unknown material.
  3. 6. related to a galaxy; this is a shortened term for "quasi-stellar radio source"
  4. 10. the person who discovered that the spectra of all galaxies, except for the few closest to Earth, are shifted toward the red end of the spectrum (red shifted).
  5. 12. a general statement that explains how the natural world behaves under certain conditions and for which no exceptions have been found.
  6. 14. a galaxy that has no particular shape; low total mass & rich is gas & dust.
  7. 16. the study of the origin, structure, and future of the universe.
  8. 19. a galaxy that has a nucleus of bright stars and flattened arms that spiral around the nucleus; composed of young stars, gas, & dust.
  9. 20. pairs of stars that revolve around each other and are held together by gravity.
Down
  1. 2. patterns of stars and the region of space around them.
  2. 3. a large-scale group of stars, gas, and dust that is bound together by gravity.
  3. 4. an idea or explanation that is based on observations that can be tested
  4. 7. The ______________states that billions of years ago, all the matter and energy in the universe was compressed into an extremely small volume.
  5. 8. radiation uniformly detected from every direction in space, considered a remnant of the Big Bang.
  6. 9. formed from a nebula that has collapsed to form groups of hundreds or thousands of stars
  7. 11. when galaxies or stars move away from Earth their spectra change in this color direction; can be used to determine the speed at which they are moving AWAY from Earth.
  8. 13. the possible center of a quasar.
  9. 15. a spiral galaxy that has a straight bar of stars that runs through the center.
  10. 17. a galaxy that varies in shape from nearly spherical to very elongated; contain few young stars & very little dust & gas.
  11. 18. a type of matter that does not give off light.