| A | B |
|---|
| solar system | sun and the bodies that move around it |
| planet | one of the nine bodies that move around the sun |
| orbit | oval shaped path on which an object travels around another body |
| revolution | the movement of a planet along its orbit |
| rotation | the turning of a body on its axis |
| corona | the hot outer atmosphere of the sun |
| solar flare | an eruption on the surface of the sun |
| sunspot | a dark region on the surface of the sun |
| astronomy | the study of objects in the sky |
| telescope | device that makes distant objects look brighter, cleaner, and nearer |
| space probe | spacecraft without humans aboard that gathers data and objects in space |
| inner planets | four planets closest to the sun |
| outer planets | five planets farthest from the sun |
| meteoroid | a mass of metal or stone moving through space |
| meteor | streak of light caused by a meteoroid passing through earth's atmosphere |
| meteorite | meteoroid that lands on earth |
| asteroids | chunks of rock found mainly in the region of space between Mars and Jupiter |
| comet | a body in space that is formed of rocks, frozen water,frozen gases,and dust |
