Space Vocabulary

1. Celestial bodies in our solar system, including Earth, that orbits the sun.
6. Another word for earth-centred.
7. Locate a celestial body relative to a fixed Earth )as thought the celestial bodies are circling Earth).
12. A set of axes of any kind that is used to describe the positions and motions of things.
14. Device used to measure an object's azimuth.
15. Determines the fineness of detail a telescope can produce of an object in view.
16. The lens through which you view a magnified object using a telescope.
17. Angle measured above the horizon in degrees when measuring altitude-azimuth co-ordinates.
18. The large lens at the front of a telescope.
19. To cast back from a surface (mirror for objective).

2. Device used to measure the altitude of an object.
3. A model of the universe that places the Sum at the centre with Earth, the planets and moons revolving around it.
4. Another word for ocular lens.
5. The angle measured clock-wise from north when measuring altitude-azimuth co-ordinates.
8. Newton's law states that all objects attract all other objects, and provides an explanation for the planets' elliptical orbits.
9. Make (a ray of light) change direction when it enters at an angle (lens for objective)
10. A model of the universe that places Earth at the centre with the Sun, moon, and planets revolving around it.
11. A figure that looks like a squashed circle; planets in the solar system move in elliptical orbits around the sun.
13. All objects seen in the sky. E.g. Moon, sun, stars, and planets.