Is There Anyone Out There

Is There anyone Out There?

外面有人吗？

Is there life in space? Have yoa ever looked up at the sky on a dark night, and wondered if somewhere in the universe there's a planet like Earth with life on it? There are billions of stars and many could have planets near them. Could any of these planets have life on them?

太空中有生命吗？ 你有没有在漆黑的夜晚仰望天空，想知道宇宙中是否有一个像地球一样的星球上有生命？ 有几十亿颗恒星，许多恒星附近可能有行星。这些行星上有生命吗？

What's the difference between a planet and a star? Stars make light and heat. Planets are smaller than stars and go around them. The planet we live on is Earth. The star that the Earth goes around is the Sun.

行星和恒星有什么区别？ 星星产生光和热。行星比恒星小，并且绕着它们转。我们生活的星球就是地球。地球绕着太阳转的那颗星。

What sort of planet is best for life? First of all, we need to know what sort of planet is most likely to have life. What sort of planet should we look for? Let’s take a look at Earth. We know that Earth is a good place for life. If we find other planets like Earth, there's a chance they*! ! have life too. Life file: Earth. Earth has water. AU living things need liquid water. Our bodies are made mostly of water. Earth has air. Life on Earth needs air to survive. Earth is the right temperature. It isn't too hot and isn't too cold. Life on Earth does best between 5℃ to 40℃.

什么样的行星最适合生命？ 首先，我们需要知道什么样的行星最有可能有生命。我们应该寻找什么样的行星？ 让我们看看地球。我们知道地球是生命的好地方。如果我们发现像地球这样的其他行星，它们就有可能！！也要有生命。 生活档案：地球。地球有水。生命需要液态水。我们的身体主要由水构成。 地球有空气。地球上的生命需要空气才能生存。地球是正确的温度。天气不太热也不太冷。地球上的生命最好在5℃到40℃之间。

Is there life in the SQI-ST System? All the planets in our Solar System go around a star called the Sun. Earth is good for life because it*s just the right distance from the Sun. If Earth were much closer to the Sun, it would be too hot and the water on Earth would boil away. If it were much further from the Sun, it would be too cold and the water on Earth would freeze solid.

SQI-ST系统中有生命吗？ 太阳系中的所有行星都围绕着一颗叫做太阳的恒星运行。地球对生命是有益的，因为它离太阳的距离正好。 如果地球离太阳近得多，就会太热，地球上的水就会沸腾。 如果离太阳远一点，天气就会太冷，地球上的水就会冻成固体。

Lefs see if any other planets in the Solar System could support life. Venus and Mars are worth looking at because they are closest to us. Are they like Earth? Life file : Venus. Venus is closer to the Sun than the Earth. The air is impossible for humans to breathe, but it would be fine for some kinds of life. The surface is a burning hot 500°C and there's no liquid water. The first spacecraft from Earth to land here only survived 28 minutes. Venus is far too hot and dry for life. The surface of Venus looks flat because it's covered with clouds. The photograph on the right was take below the clouds.

LEF观察太阳系中是否有其他行星可以维持生命。金星和火星值得一看，因为它们离我们最近。它们像地球吗？ 生活档案：维纳斯。金星比地球离太阳近。空气对人类来说是不可能呼吸的，但对某些种类的生命来说是可以的。 表面是500°C的高温，没有液态水。 从地球到这里着陆的第一艘宇宙飞船只存活了28分钟。金星对生命来说太干热了。 金星的表面看起来很平坦，因为它被云覆盖着。右边的照片是在云层下拍摄的。