Space Exploration Unit Vocabulary- Topic 1 and 2

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