Unit 3 Space Vocabulary List

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Across
  1. 6. An object that moves around a larger object
  2. 11. Device used to form magnified images of distant object
  3. 12. the force acting on an object due to gravity
  4. 16. The force that attracts a body toward the center of the earth, or toward any other physical body having mass
  5. 19. A rotating circumstellar disk of dense gas surrounding a young newly formed star
  6. 20. Instruments that use the properties of wavelength and light to investigate the composition of substances
  7. 22. All existing matter and space considered as whole; cosmos
  8. 24. The distance light travels in one year
  9. 25. The process by which two light atomic nuclei combine to form a single heavier one while releasing massive amounts of energy
Down
  1. 1. An enormous cloud of dust and gas occupying the space between stars and acting as a nursery for new stars
  2. 2. The stellar core left behind after a dying star has exhausted its nuclear fuel and expelled its outer layers to form a planetary nebula
  3. 3. The colossal explosion of a star
  4. 4. A regular, repeating path that one object in space takes around another one
  5. 5. How astronomers explain the way the universe works began
  6. 6. The springing forth of the tide during new and full moon
  7. 7. The change in the wavelength of frequency of the waves with respect to the observer who is in motion relative to the wave source
  8. 8. Shows the relationship between a star's temperature and its luminosity
  9. 9. A broad band of light that can be seen in the night sky and that is caused by the light of a very number of fait stars
  10. 10. A period of moderate tides when the sun and moon are at right angles to each other
  11. 13. A place where gravity pulls so much that even light can not get out
  12. 14. A system of millions or billions of stars, held together by gravitational attraction
  13. 15. Very long-period waves that move through the ocean in response to the force exerted by the moon and sun
  14. 17. The measure of the amount of matter in a body
  15. 18. A spectrum of the electromagnetic radiation emitted by a source
  16. 21. An unpiloted, unmanned device sent to explore space and gather scientific information
  17. 23. Any massive self-luminous celestial body of gas that shines by radiation derived form its internal energy sources