Topics 1 & 2 Vocab

3. the device used to measure the altitude of an object
4. the lens through which you view a magnified object using a telescope; eyepiece
6. a ray of light changing direction when it passes through a new substance
8. the location of a celestial body relative to a fixed Earth (as though celestial bodies circled the Earth)
9. Sun-centered model of the universe
12. a set of axes of any kind that is used to describe the positions or motions of things
15. celestial bodies that orbit a star in a solar system (ex: Earth, Mars, Neptune)
18. groupings of stars that form patterns, which appear like objects and are given names (ex: Orion, The Big Dipper)
19. the ocular lens of a telescope
20. the device used to measure the azimuth of an object

1. the angle measured above a horizon when determining the location (altitude-azimuth co-ordination) of a celestial body
2. the large lens at the front of the telescope
5. Newton’s law states that all objects attract all other objects and provides an explanation for the planet’s elliptical orbit
7. determines the fineness of a detail a telescope can produce of an object view
8. the angle measured clockwise from North when determining the location (altitude-azimuth co-ordination) of a celestial body
10. all objects seen in the sky (ex: Sun, Moon, planets, stars)
11. Earth-centered model of the universe
13. a figure that looks like a squashed circle; planets move in elliptical orbits around the Sun
14. a model of the universe that places Earth at the center, with the Sun and planets revolving around it ; geocentric
16. a model of the universe that places the Sun at the center, with Earth and planets revolving around it; heliocentric
17. a ray of light changing direction when it bounces off a surface