| A | B |
|---|
| orbit | Path of a celestial body as it revolves around another body. |
| asteroid | Celestial bodies that revolve around the sun. Most live between Jupiter and Mars. |
| Saturn | This planet is so light it could float on water. It has numerous rings and moons. |
| Venus | This planet has a high concentration of carbon dioxide gas and sulfric acid. |
| Mars | The red planet with a lot of iron and oxygen. It has the largest volcano in the Solar System. |
| Uranus | This planet is bright blue and rotates on its side possibly from a collison with a large object. |
| Pluto | Now a dwarf planet with a solid rocky surface. |
| sun | A star that is the center of our planetary system. |
| Neptune | Eighth planet from the sun. |
| Earth | The only planet that supports life. |
| Mercury | Closest planet to the sun with no moons and a very hot surface. |
| satellite | A celestial body that orbits a planet. |
| meteorite | A space object that does no burn up in the mesosphere and strikes the Earth's surface. |
| meteor | A space object that can be made of rock and space material that glows when it burns up in the Earth's atmosphere. |
| comet | A space object that is made of ice and rock and forms a tail of gas and dust when it moves past the sun. |
| Ellipse | The path of the orbit the planets move around the sun. |
