我們可能發現了另一個地球在與太陽系最近的星系裡!

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goldilocks_planet1_h

一份報告揭露了科學家們在太陽系外發現了一個跟類似地球的星球,而歐洲太空天文台將在八月底揭露他們的發現。

最佳候選者

近來,從克卜勒找到的星球名單中,研究揭示20個潛在的「地球2.0」候選名單:使得在我們得地球外尋找生命跡象得任務變得較可以想像。現在,它的想像空間增加了點。

German Weekly Der Spiegel 報告聲稱(雖然是引用匿名來源):歐洲天文學家發現一個新得類似地球得星球,而且非常接近我們。 這個星球(尚未命名)被發現繞著比鄰星(Proxima Centauri)運行:是最接近太陽系的恆星,而在適合居住的區域可以保存液態水在星球表面。

Alpha_Centauri_Stellar_Sizes

雖近在眼前,卻如此遙遠

比鄰星是半人馬座阿爾法星系統的一顆恆星,是最接近太陽系的恆星系,距離大約4.35光年。

PIA18003-NASA-WISE-StarsNearSun-20140425-2

但縱使如此,這個星球還是會報被發現「如此接近」,但以現代科技來說仍然太遠無法抵達。 做個記錄:一光年是在一年光速的距離,而光速是每秒300,000公里(186,000英里)。

再次強調,宇宙是個廣闊的空間。研究鄰近的系外行星應該是尋找地外生命的最好的選擇了。

Der Spiegel 寧可將這個發現的詳細內容保留,且說歐洲太空天文台ESO將會在八月底公佈這個發現。

無論如何,雖然知道雜誌的報導, ESO的發言人Richard Hook既不承認也不否認。

Shining brightly in this Hubble image is our closest stellar neighbour: Proxima Centauri. Proxima Centauri lies in the constellation of Centaurus (The Centaur), just over four light-years from Earth. Although it looks bright through the eye of Hubble, as you might expect from the nearest star to the Solar System, Proxima Centauri is not visible to the naked eye. Its average luminosity is very low, and it is quite small compared to other stars, at only about an eighth of the mass of the Sun. However, on occasion, its brightness increases. Proxima is what is known as a “flare star”, meaning that convection processes within the star’s body make it prone to random and dramatic changes in brightness. The convection processes not only trigger brilliant bursts of starlight but, combined with other factors, mean that Proxima Centauri is in for a very long life. Astronomers predict that this star will remain middle-aged — or a “main sequence” star in astronomical terms — for another four trillion years, some 300 times the age of the current Universe. These observations were taken using Hubble’s Wide Field and Planetary Camera 2 (WFPC2). Proxima Centauri is actually part of a triple star system — its two companions, Alpha Centauri A and B, lie out of frame. Although by cosmic standards it is a close neighbour, Proxima Centauri remains a point-like object even using Hubble’s eagle-eyed vision, hinting at the vast scale of the Universe around us.

來源:Futurism