|   | English |   |   | Vietnamese |   |
  | ![sound](/images/general/playSound.png) | Our solar system | | | |
  | ![sound](/images/general/playSound.png) | Our solar system is really, really big! | | | |
  | ![sound](/images/general/playSound.png) | It is also very, very old. | | | |
  | ![sound](/images/general/playSound.png) | Scientists think our solar system is about 5 billion years old. | | | |
  | ![sound](/images/general/playSound.png) | Scientists who study our solar system are called astronomers. | | | |
  | ![sound](/images/general/playSound.png) | People who explore the solar system are called astronauts. | | | |
  | ![sound](/images/general/playSound.png) | Astronomers and astronauts help us to learn about our solar system. | | | |
  | ![sound](/images/general/playSound.png) | Our solar system is made up of the Sun and 9 planets. | | | |
  | ![sound](/images/general/playSound.png) | There are also moons, comets, and asteroids. | | | |
  | ![sound](/images/general/playSound.png) | Most of our solar system is empty space filled with gas and dust. | | | |
  | ![sound](/images/general/playSound.png) | The planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. | | | |
  | ![sound](/images/general/playSound.png) | Some of the planets have moons. | | | |
  | ![sound](/images/general/playSound.png) | Saturn has 3 rings. | | | |
  | ![sound](/images/general/playSound.png) | The planets orbit around the sun. | | | |
  | ![sound](/images/general/playSound.png) | The moons orbit around their planets. | | | |
  | ![sound](/images/general/playSound.png) | In drawings the planets look very close to each other. | | | |
  | ![sound](/images/general/playSound.png) | They aren't! | | | |
  | ![sound](/images/general/playSound.png) | They are very, very, far away from each other. | | | |
![solar system solar system](/images/vocabulary/N1364s.png) | ![sound](/images/general/playSound.png) | solar system | | | Vệ tinh. |
![astronomer astronomer](/images/vocabulary/N1365s.png) | ![sound](/images/general/playSound.png) | astronomer | | | Nhà thiên văn học |
![comet comet](/images/vocabulary/N1366s.png) | ![sound](/images/general/playSound.png) | comet | | | Sao chổi |
![asteroid asteroid](/images/vocabulary/N1367s.png) | ![sound](/images/general/playSound.png) | asteroid | | | Thiên thạch |
  | ![sound](/images/general/playSound.png) | planet | | | Hành tinh |
![Mercury Mercury](/images/vocabulary/N1369s.png) | ![sound](/images/general/playSound.png) | Mercury | | | sao Thuỷ |
![Venus Venus](/images/vocabulary/N1370s.png) | ![sound](/images/general/playSound.png) | Venus | | | Sao Kim |
![Mars Mars](/images/vocabulary/N1371s.png) | ![sound](/images/general/playSound.png) | Mars | | | sao Hải vương |
![Jupiter Jupiter](/images/vocabulary/N1372s.png) | ![sound](/images/general/playSound.png) | Jupiter | | | Sao Hoả |
![Saturn Saturn](/images/vocabulary/N1373s.png) | ![sound](/images/general/playSound.png) | Saturn | | | Sao Thổ |
![Uranus Uranus](/images/vocabulary/N1374s.png) | ![sound](/images/general/playSound.png) | Uranus | | | Sao Thiên Vương |
![Neptune Neptune](/images/vocabulary/N1375s.png) | ![sound](/images/general/playSound.png) | Neptune | | | Sao Mộc |
![Pluto Pluto](/images/vocabulary/N1376s.png) | ![sound](/images/general/playSound.png) | Pluto | | | sao Diêm vương |
![moon moon](/images/vocabulary/N213s.png) | ![sound](/images/general/playSound.png) | moon | | ![sound](/images/general/playSound.png) | Mặt trăng |
![sun sun](/images/vocabulary/N266s.png) | ![sound](/images/general/playSound.png) | sun | | ![sound](/images/general/playSound.png) | Mặt trời |
![Earth Earth](/images/vocabulary/N273s.png) | ![sound](/images/general/playSound.png) | Earth | | ![sound](/images/general/playSound.png) | Trái đất |
![star star](/images/vocabulary/N524s.png) | ![sound](/images/general/playSound.png) | star | | | Hình ngôi sao |