Read.

閱讀。

Traveling together around the Sun.

一起繞著太陽旅行

The Sun is a star and it is very important for our planet Earth.

太陽是一顆恆星，對我們的地球非常重要。

It gives us light and heat, however Earth is not alone.

它給我們帶來光和熱，但地球並不孤獨。

It shares the Sun with seven other planets.

它與其他七顆行星共享太陽。

Together these planets revolve around the Sun in a solar system.

這些行星在太陽系中圍繞太陽公轉。

Other bodies travel in this solar system such as moons, asteroids and comets.

其他天體也在太陽系中旅行，如衛星、小行星和彗星。

They all move around the Sun because the Sun's gravity is very strong.

它們都圍繞太陽運動，因為太陽的引力非常強大。

Each planet's path around the Sun is called an orbit.

每顆行星繞太陽運行的軌跡稱為軌道。

The planets that are closer to the Sun have smaller orbits, so they take less time to go around it.

離太陽較近的行星軌道較小，是以繞太陽運行的時間較短。

Mercury takes 88 days to complete one orbit.

水星完成一個軌道需要 88 天。

Earth completes one orbit in 365 days or one year.

地球在 365 天或一年內完成一個軌道。

Neptune's orbit takes 60,200 days or almost 165 years.

海王星的軌道需要 60,200 天，差不多 165 年。

Each planet in our solar system is unique.

太陽系中的每顆行星都是獨一無二的。

For example, Mercury is the smallest planet.

例如，水星是最小的行星。

It has lots of craters just like our Moon.

它有很多環形山，就像我們的月球一樣。

Jupiter is the biggest planet.

木星是最大的行星

Its diameter is 11 times bigger than Earth's.

它的直徑是地球的 11 倍。

Saturn has giant rings of matter around it.

土星周圍有巨大的物質環。

Neptune is farthest planet from the Sun.

海王星是距離太陽最遠的行星。

Mars is a neighbouring planet and scientists are learning a lot about it.

火星是一顆鄰近的行星，科學家們正在對它進行大量的瞭解。

They send many space probes to Mars.

他們向火星發射了許多太空探測器。

A space probe called Curiosity landed on Mars on August 6, 2012.

2012年8月6日，一個名為 "好奇號 "的太空探測器登陸火星。

Curiosity is as big as a car and it moves over the surface of Mars.

好奇號有一輛汽車那麼大，它在火星表面移動。

It recently found rocks that had strange shapes.

它最近發現了一些形狀奇特的岩石。

Running water made these shapes.

流水造就了這些形狀。

This is an important discovery.

這是一個重要的發現。

Space probes like Curiosity continue to explore the planets, moons and other bodies in our solar system.

像 "好奇號 "這樣的太空探測器在繼續探索太陽系中的行星、衛星和其他天體。

If technology continues to grow, we will travel to these places ourselves.

如果技術繼續發展，我們將親自前往這些地方。

Iron and rock make up most of the four smaller inner planets of our solar system.

太陽系中的四顆較小的內行星大多由鐵和岩石構成。

Gas and water make up most of the four larger outer planets.

氣體和水構成了四顆較大的外行星的大部分。

This means that you can stand on the surface of Earth, but you can't stand on Saturn.

這意味著，你可以站在地球表面，卻無法站在土星上。

In fact, if you tried to stand on Saturn, you would sink down to the core of the planet.

事實上，如果你想站在土星上，你就會沉到土星的地心。

Drawings of our solar system show the planets close to the Sun.

太陽系的圖畫顯示行星靠近太陽。

However, the distance between the planets and the Sun is very far.

然而，行星與太陽之間的距離非常遙遠。

For example, it would take 176 years to drive a car from Earth to the Sun.

例如，將一輛汽車從地球開到太陽需要 176 年。

It would take 5,300 years to drive from Neptune to the Sun.

從海王星到太陽需要 5300 年。

Astronomers think that there are many solar systems in our Milky Way galaxy.

天文學家認為，銀河系中有許多太陽系。

However, our solar system is special to us.

然而，我們的太陽系對我們來說很特別。

It is our home.

這是我們的家。

The asteroid belt.

小行星帶

An asteroid belt runs between the inner and outer planets.

小行星帶位於內行星和外行星之間。

Scientists have discovered over 7,000 asteroids there, and there may be millions more.

科學家在那裡發現了 7000 多顆小行星，可能還有數百萬顆。

Asteroids travel around the Sun, just like planets.

小行星像行星一樣圍繞太陽運行。

The sister planets.

姊妹行星

Did you know that Earth and Venus are called sister planets?

你知道地球和金星被稱為姊妹行星嗎？

This is because they are almost the same size, and Venus is the closest planet to Earth.

這是因為它們的大小几乎相同，而金星是距離地球最近的行星。

However, Venus is much hotter than Earth, and it is always covered in thick clouds.

然而，金星的溫度比地球高得多，而且總是被厚厚的雲層所覆蓋。