Topics 1 & 2 Vocab

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