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Search Unearths Plethora of Earth-Mass Planets
尋找“地球號”

If there's a line in Vegas on the odds of life on another planet, now might be a good time to place a wager. A study in the journal Science examined 166 sun-sized stars and found nearly one in four had rocky, earth-sized planets in close, Earth-like orbits. The finding might chart a new course for extrasolar planet research.
如果維加斯有賭桌賭外星球有生命的幾率，現(xiàn)在正是下手的好機(jī)會?！犊茖W(xué)》雜質(zhì)上的一項(xiàng)研究檢測了166個太陽大小的恒星，發(fā)現(xiàn)它們附近有近1/4的行星多巖石，地球大小且擁有類地軌道。這一發(fā)現(xiàn)可能會開創(chuàng)系外行星研究新標(biāo)向。

Most planet-formation models predict a “planet desert” within one astronomical unit (or the average distance from the Earth to the sun) of a host star. Gaseous planets like Jupiter or Saturn, which form much farther away, on the cold side of what’s called the “ice line,” are thought to be more common.
大多數(shù)行星形成模型預(yù)言在主恒星一個天文單位（或從地球到太陽的平均距離）以內(nèi)會有一個“沙漠之星”。而像木星或土星這樣的遠(yuǎn)距離氣態(tài)行星則在普通不過，它們冰冷的一面就是所謂的“冰原帶”。

But a team of researchers at Hawaii's Keck observatory cast their eyes on stars similar to our sun. Twenty-three percent of those stars had small, rocky planets orbiting right in the range where the predicted “planet desert” should be. [Andrew Howard et al., "The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters"]
但夏威夷的凱克天文臺的一個研究小隊(duì)卻將他們的目光投在了類似太陽的恒星上。23%的行星都很小，多巖石，其繞行軌道正處于預(yù)言的“沙漠之星”的活動范圍之內(nèi)。

The researchers say their discovery calls for substantial revisions to current astronomical models. It also makes the possibility of life on some similar planet spinning a similar, habitable distance from its sun seem like a better bet.
研究人員表示他們的發(fā)現(xiàn)將對現(xiàn)有的天文模型有實(shí)質(zhì)性的改動。這樣看起來在與太陽距離合適的類似行星上居住貌似是個更好的選擇。

—Adam Hinterthuer

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