For Our Eyes Only Key Vocabulary

2. an instrument used to measure an object’s azimuth.
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.
7. a model of the universe with the Sun located in the middle with the planets and the moon revolving around it.
8. of Reference any axes that is used to describe the movement and the location of an object.
9. also known as Earth-centered; Earth is located in the center with the Sun, moon and planets revolving around it.
11. Co-ordinates angles used to indicate the co-ordinates of a celestial body.

1. the angle measured above the horizon when measuring the altitude-azimuth co-ordinates.
2. Bodies natural object that is visible in the sky. I.e. the sun, moon, stars etc.
3. an instrument used to measure the altitude of an object.
5. a model of the universe where the Earth is in the center with the Sun, moon and planet revolving around the Earth.
6. unchanging patterns in the sky made by connecting stars.
10. celestial bodies that orbit around the sun in an elliptical order.
11. an angle being measured in a clockwise rotation starting from the North when measuring the altitude-azimuth co-ordinates.