| A | B |
|---|
| elliptical | oval in shape (ORBITS) |
| model | shows how something works or looks |
| Ptolemy's model | suggests that the sun and other objects revolve AROUND THE EARTH |
| Copernicus's model | suggests that sun is at the center of solar system; planets revolve in circles around it. |
| Kepler's model | suggests planets travel in an elliptical path around the SUN |
| asteroid | a rocky object that revolves around the sun |
| meteoroid | a small piece of rock or metal that travels in space around the sun |
| meteor | a bright streak of light that passes through the earth's atmosphere |
| comet | a ball of dust, ice and gases that travels through space and orbits the sun |
| meteorite | a piece of meteorid that lands on Earth after passing through the atmosphere |
| the SUN | average-size STAR ; center of solar system |
| makeup of sun | a glowing ball of hot gases |
| the MOON | shines by reflecting light from SUN |
