Earth-like Planets in Our Galaxy銀河系中的地球

很多人都想知道,除了地球,宇宙中還有其他地方適合生物生存嗎?科學家根據美國太空總署(NASA)提供的資料,計算出銀河系大約四百億顆類似太陽的恆星中,大約有22%都擁有一顆類似地球的行星。這八十八億顆行星,體積和地球相仿,距離恆星的位置適中,溫度不會太冷或太熱;最接近地球的那顆行星,距離地球大約12光年。

Many people are eager to know if there is other habitable planet besides the Earth in the universe.  According to the data provided by NASA, scientists have found 40 billion of Sun-like stars, 22% of which own a planet similar to the Earth.  These 8.8 billion planets are Earth-size planets and orbit in the habitable zone where the temperature is not too cold and not too hot.  The planet closest to the Earth is about 12 light-year away from us.

關鍵字:

1.銀河系(n.) yínhéxì
Milky Way; Galaxy

2.宇宙 (n.) yǔzhòu
universe

3.恆星(n.) héngxīng
star

4.行星(n.) xíngxīng
planet

5.體積(n.) tǐjī
capacity

6.光年(Measure Word) guāngnián
Light-year

參考網站:
http://www.universetoday.com/106121/

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