1、优质文档优质文档The science of astronomy for kids浩瀚的宇宙无边无际、无始无终，这给无数人带来了无尽的遐想。它的神奇和神秘不仅开启了古今中外科学家的探索之路，而且强烈地吸引着孩子们！The science of astronomy (天文学) is interesting. There are a lot of kids who are interested in the planets, the solar system, the universe and everything else thats part of this exciting science.
2、 For children, many parts of it are magical and they are drawn towards the moon, the stars and far distant galaxies (星系 ). The moon is Earths only satellite. It takes about 27 days to travel around the Earth. Gravity (地心引力) between the moon and Earth causes the tides. Its brightness in the night sky
3、 attracts many children to learn more about it. Then theres our sun. Earth is quite far from the sun. The distance is between about 91 million miles and about 94 million miles. Thats because Earths orbit (轨道) around the sun isnt a circle; its an ellipse (椭圆). If there were no sun, we wouldnt be aliv
4、e. Our light and heat comes from the sun. Over 98% of the total stuff in our solar system is in the sun. Think about how small a person is compared to that. We live in the Milky Way galaxy. Its full of space stuff. Even with all this stuff to fill it, its mostly empty. At over 100,000 light years wi
5、de and 3,000 light years high, that means the galaxy holds a whole lot of nothing. The center of our galaxy is about 30,000 light years from Earth. Even with all that space there are about 100 billion stars in the Milky Way. In fact the galaxy was named after the thick group of stars in the main part of it. People thought it looked like a stream of milk, so they called it the Milky Way. There is a lot of information about astronomy for kids on the Internet. Kids can easily learn more about the universe around us.
