Topics 1 & 2 Vocab

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