Features Of The Universe

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Across
  1. 2. A powerful and luminous stellar explosion
  2. 3. Smaller than a star and doesn't give off light
  3. 7. Millenium- 1000 years Century-100 years decade-10 years
  4. 9. How astronomers explain the way the universe began
  5. 10. The boundless three-dimensional extent to which objects and events have relative position and direction
  6. 12. the substance or substances of which any physical object consists or is composed
  7. 14. The distance light travels in one year
  8. 16. Where gravity and density are infinite and space-time extends into infinity
  9. 17. Any massive self-luminous celestial body of gas
  10. 18. A hot ball of glowing gases at the heart of our solar system
Down
  1. 1. Highly magnetized rotating compact star
  2. 4. A giant cloud of dust and gas in space
  3. 5. A very large star of high luminosity and low surface temperature
  4. 6. The change in wave frequency during the relative motion between a wave source and its observer
  5. 8. Radio waves, microwaves, infrared, visible, ultraviolet, X-ray and gamma radiation are all different forms of light
  6. 11. It may exist in potential, kinetic, thermal, helectrical, chemical, nuclear, or other forms
  7. 13. An individual form of life that is capable of growing and reproducing, and have one or more cells.
  8. 15. Sprawling systems of dust, gas, dark matter