| A | B |
|---|
| asteroids | orbit the sun between Mars and Jupiter |
| comet | orbit the sun in very eccentric orbits (have a tail) |
| galaxy | system of billions of stars held together by gravity |
| Moon | Earth's only natural satellite |
| Milky Way | galaxy that we are in |
| planet | means "wandering star" |
| telescope | intrument that makes it possible to study the stars |
| meteor | a "shooting star" |
| Jupiter | the most massive planet in our solar system |
| ellipse | the shape of a planet's orbit around the sun |
