Across
- 6. The large lens at the very front of a telescope.
- 8. A telescope that has a mirror for the objective.
- 10. The groupings of stars that form patterns, which appear like objects and are given names; there are currently 88 (ex. Orion, the hunter).
- 13. The ocular lens part of a telescope.
- 18. Used to locate a celestial body relative to a fixed earth (as though the celestial bodies are circling the earth).
- 21. To cast back -light, heat, or sound..etc- from a surface.
- 23. A model of the universe with the Earth at the centre.
Down
- 1. A device used to measure the altitude of an object.
- 2. The change of direction by a ray of light, sound, and heat, in passing diagonally from one medium into another.
- 3. The lens you look through to view a magnified object using a telescope.
- 4. A set of axes of any kind that is used to describe the positions or motions of things.
- 5. Is the angle measured above the horizon in degrees when measuring altitude-azimuth coordinates.
- 7. Newton’s law states that all objects attract all other objects and provides a logical explanation for the planets’ elliptical orbits.
- 9. A device used to measure an object’s azimuth.
- 11. A model of the universe that places the Sun at the centre with the Earth, the planets, and moons revolving around it.
- 12. A telescope that has a lens for the objective.
- 14. A figure that looks like a squashed circle; planets in the solar system more in elliptical orbits around the sun.
- 15. A model of the universe that puts the Earth at the centre with the Sun, Moon, and the other planets revolving around it.
- 16. Celestial bodies in our solar system, including Earth, that orbit the Sun.
- 17. A model of the universe with the Sun at the centre.
- 19. All the objects seen in the sky (Sun, Moon, Stars, Planet).
- 20. Determines the fineness/quality of detail a telescope can produce of an object in view.
- 22. Is the angle measured clockwise from the north when measuring altitude-azimuth coordinates.