Space Exploration Unit Vocabulary- Topic 1 and 2

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