科一科二 · 科二
The planets in our solar system
We all live on a planet. Our planet is called Earth. It is one of nine planets that go around the sun.
You probably know the names of some of the planets. Maybe you know all of them. The nine planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.
The nine planets are part of the solar system. The most important part of the solar system is the sun. The word sol means sun in Latin. So the solar system means " the sun system. After the sun, the most important parts of the solar system are the nine planets
Have you ever tried to find the planets in the sky! Uranus, Neptune, and Pluto are very dim. You need a telescope to see them. You don't need a telescope to see Venus, Mars, Jupiter, or Saturn. They look like bright stars, but they don't twinkle. They glow. You may have seen them and thought they were stars.
You don't need a telescope to see Mercury, either, You can see it in early evening just after sunset. The sky is not very dark then, so you have to be a good sky watcher to find Mercury. But there is another part of the solar system that you can see easily. It is the moon. The moon goes around Earth. It's called Earth's satellite. Most of the other planets also have satellites,
