開普勒望遠鏡發現另一顆地球

　　美國宇航局(NASA)今天上午，開普勒望遠鏡新發現舉行新聞發布會，宣布發現“另一顆地球”。

　　NASA on Thursday announced the discovery of Kepler-452b, the most Earth-like planet ever found. Located 1,400 light-years from our planet, NASA called it "Earth 2.0,"because it's the first planet discovered in the habitable zone of a G star similar to our sun.

　　美國國家航空航天局(以下簡稱周四)NASA)發現開普勒-452b，它是迄今為止與地球最相似的行星。這顆行星距離地球1400光年，NASA將其命名為“地球2.0”，因為它是第一顆在宜居帶中類似太陽的恒星附近發現的行星。

　　"We can think of Kepler-452b as an older, bigger cousin to Earth, providing an opportunity to understand and reflect upon Earth's evolving environment," said Jon Jenkins, the Kepler data analysis lead at NASA's Ames Research Center.“

　　我們不妨開普勒-452b認為地球年紀大，體積大“老表”。我們可以從中了解和反思地球演變的環境，”NASA瓊，艾姆斯研究中心開普勒數據分析的領導者·詹金斯說。

　　The planet is 5 percent farther away from its star than Earth is to the sun, making for a slightly longer year of 385 days, but gets similar light because its sun is 20 percent brighter than our own.

　　行星和恒星之間的距離比地球和太陽的距離遠5%，所以它一年(公轉周期比地球稍長)385天，但光線幾乎和地球一樣。因為它的恒星亮度比太陽高20%。

　　"The sunshine from this star would feel very similar to the sunshine from our star," Jenkins told reporters.

　　詹金斯告訴記者：“開普勒-452b陽光和我們地球上的陽光差不多。”

　　NASA believes the planet has a mass about five times more massive than Earth's, with a rocky surface below a thicker atmosphere than our own. Gravity would be about twice as strong on Kepler-452b as it is on Earth, NASA said.

　　NASA該行星的質量大約是地球的5倍，巖石表面的大氣層比地球的大氣層厚得多。開普勒-452b引力是地球引力的兩倍。

　　The planet is located in the Kepler-452 system in the constellation Cygnus. Its sun has the same surface temperature as our own, but has a diameter that is 10 percent larger.

　　行星位于開普勒-452星系的天鵝座。它的恒星表面溫度與地球相同，但直徑比地球大10%。

　　While NASA scientists have no idea if Kepler-452b's atmosphere is conducive to life, they do know that there has been plenty of time for organisms to develop.

　　雖然NASA開普勒-452b大氣環境是否有利于生命的形成，但他們知道在這個星球上有足夠的時間形成微生物有機體。

　　"It's awe-inspiring to consider this planet spent 6 billion years in the habitable zone of its star, which is longer the age of the Earth," Jenkins said. "That is considerable time and opportunity for life to arise somewhere on its surface or oceans if all the necessary conditions for life exist on this planet."

　　“這顆行星在其恒星的宜居帶中存在了60億年，比地球年齡大得多，想起來都令人敬畏，”詹金斯說，“如果行星上有適合生命存在的所有必要條件，那么它的表面就足以形成生命。”

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