原题
The stars we see in the night sky are massive balls of gas that give off light and heat. Our S is o of these, and i provides t energy nee for li on Ea. These celestial bodies a grouped in collections cal galaxies. Our solar system belongs to the Milky Way galaxy. Scientists known as astronomers study these distant lights to better understand the universe and how it came to be.
参考答案：un ne t he ded fe rth re to led
解题思路
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