|   | English |   |
  | | Our solar system | |
  | | Our solar system is really, really big! | |
  | | It is also very, very old. | |
  | | Scientists think our solar system is about 5 billion years old. | |
  | | Scientists who study our solar system are called astronomers. | |
  | | People who explore the solar system are called astronauts. | |
  | | Astronomers and astronauts help us to learn about our solar system. | |
  | | Our solar system is made up of the Sun and 9 planets. | |
  | | There are also moons, comets, and asteroids. | |
  | | Most of our solar system is empty space filled with gas and dust. | |
  | | The planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. | |
  | | Some of the planets have moons. | |
  | | Saturn has 3 rings. | |
  | | The planets orbit around the sun. | |
  | | The moons orbit around their planets. | |
  | | In drawings the planets look very close to each other. | |
  | | They aren't! | |
  | | They are very, very, far away from each other. | |
| | solar system | |
| | astronomer | |
| | comet | |
| | asteroid | |
  | | planet | |
| | Mercury | |
| | Venus | |
| | Mars | |
| | Jupiter | |
| | Saturn | |
| | Uranus | |
| | Neptune | |
| | Pluto | |
| | moon | |
| | sun | |
| | Earth | |
| | star | |