6-8-1 and 6-8-2

4. describes something that uses the earth as the reference point
6. the point that is the closest to the sun
7. an apparent shift in position of an object when viewed from different positions
8. the point that is the farthest from the sun
9. a small body from which a planet originated in the early stages of development of the solar system
10. sun centered model of the orbits of the planets

1. the sun and all the planets and other bodies that travel around it
2. the inward force required to keep a particle or an object moving in a circular path
3. a force of attraction between objects that is due to their masses
5. a rotating cloud of gas and dust from which the sun and planets formed
11. the path that a body follows as it travels