For Our Eyes Only Key Vocabulary

2. Bodies natural object that is visible in the sky. I.e. the sun, moon, stars etc.
4. also known as Sun-centered; the Sun is located in the middle of our solar system with the moon and the planets revolving around it.
5. Co-ordinates angles used to indicate the co-ordinates of a celestial body.
7. an instrument used to measure the altitude of an object.
8. celestial bodies that orbit around the sun in an elliptical order.
10. a model of the universe with the Sun located in the middle with the planets and the moon revolving around it.
12. also known as Earth-centered; Earth is located in the center with the Sun, moon and planets revolving around it.

1. an instrument used to measure an object’s azimuth.
2. unchanging patterns in the sky made by connecting stars.
3. the angle measured above the horizon when measuring the altitude-azimuth co-ordinates.
6. a model of the universe where the Earth is in the center with the Sun, moon and planet revolving around the Earth.
9. an angle being measured in a clockwise rotation starting from the North when measuring the altitude-azimuth co-ordinates.
11. of Reference any axes that is used to describe the movement and the location of an object.