| A | B |
|---|
| elliptical | oval shaped |
| model | a representation of how something looks or works |
| asteroid | a rocky object that revolves around the sun |
| meteorid | a small piece of rock and metal that travels in space around the sun |
| meteor | a bright streak of light that passes through Earth's atmosphere |
| comet | a ball of ice, dust, and gases that travels through space and orbits the sun |
| meteorite | a piece of a meteor that land on Earth after passing through the atmosphere |
| light year | sidtance light travels in a year |
| constellation | stars that appear to be in groups when viewed from Earth |
| galaxy | a group of billions of stars, dust and gases in space held together by gravity |
