Space Exploration Unit Vocabulary- Topic 1 and 2

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