Topics 1 & 2 Vocab

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Across
  1. 1. the device used to measure the altitude of an object
  2. 3. a ray of light changing direction when it passes through a new substance
  3. 6. a set of axes of any kind that is used to describe the positions or motions of things
  4. 9. the lens through which you view a magnified object using a telescope; eyepiece
  5. 12. Earth-centered model of the universe
  6. 13. Newton’s law states that all objects attract all other objects and provides an explanation for the planet’s elliptical orbit
  7. 15. the angle measured above a horizon when determining the location (altitude-azimuth co-ordination) of a celestial body
  8. 17. a model of the universe that places Earth at the center, with the Sun and planets revolving around it ; geocentric
  9. 19. the large lens at the front of the telescope
  10. 20. a model of the universe that places the Sun at the center, with Earth and planets revolving around it; heliocentric
Down
  1. 1. the location of a celestial body relative to a fixed Earth (as though celestial bodies circled the Earth)
  2. 2. the angle measured clockwise from North when determining the location (altitude-azimuth co-ordination) of a celestial body
  3. 4. groupings of stars that form patterns, which appear like objects and are given names (ex: Orion, The Big Dipper)
  4. 5. a ray of light changing direction when it bounces off a surface
  5. 7. the ocular lens of a telescope
  6. 8. a figure that looks like a squashed circle; planets move in elliptical orbits around the Sun
  7. 10. all objects seen in the sky (ex: Sun, Moon, planets, stars)
  8. 11. Sun-centered model of the universe
  9. 14. determines the fineness of a detail a telescope can produce of an object view
  10. 16. the device used to measure the azimuth of an object
  11. 18. celestial bodies that orbit a star in a solar system (ex: Earth, Mars, Neptune)