Space Exploration Unit Vocabulary- Topic 1 and 2

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Across
  1. 4. A model of the universe that places the Earth at the center with the sun, moon and planets revolving around it.
  2. 7. Newton’s law that states all objects attract other objects and provided an explanation for the planets' orbit.
  3. 9. Grouping of stars that form patterns and are given names.
  4. 10. Angle measured from above the horizon in degrees.
  5. 12. Large lens at the front of a telescope.
  6. 14. Another word for heliocentric.
  7. 15. Celestial bodies in our solar system that orbits the sun.
  8. 17. Determines the fineness of detail a telescope can produce of an object.
  9. 19. Device used to measure the azimuth of an object.
  10. 20. Device used to measure the altitude of an object.
  11. 21. Angle measured clockwise from north.
Down
  1. 1. Used to locate a celestial body relative to a fix Earth.
  2. 2. A set of axes of any kind used to determine a position or motion of things.
  3. 3. Objects seen in the sky like the sun and the planets.
  4. 5. Figure that looks like a squashed circle. Planets in the solar system travel in a similar manner.
  5. 6. To cast back light, heat or sound from a surface.
  6. 8. A model of the universe that places the sun at the center with the planets and moon revolving around it.
  7. 11. Lens from where you view a magnified object using a telescope.
  8. 13. Another word for ocular lens.
  9. 16. A change of direction of a ray of light, sound or heat in passing through one medium into another.
  10. 18. Another word for earth-centered.