本文摘要:pointahigh-poweredtelescopeattheconstellationcetus,the sea monster, anditisjustpossibletomakeoutadimreddwarfstarshininginthetail .用于用高倍率望远镜仔细观察鲸鱼座(Ceuts,名字叫海怪),星座尾部闪烁着明亮的红矮星althoughitmightseemunspectacular是orbitingaroundthatstarisarockyplanetthatcouldholdtheanswertowherwearealoneintheuniverse。

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pointahigh-poweredtelescopeattheconstellationcetus,the sea monster, anditisjustpossibletomakeoutadimreddwarfstarshininginthetail .用于用高倍率望远镜仔细观察鲸鱼座(Ceuts,名字叫海怪),星座尾部闪烁着明亮的红矮星althoughitmightseemunspectacular是orbitingaroundthatstarisarockyplanetthatcouldholdtheanswertowherwearealoneintheuniverse。scientistssaytheplanetisa‘super-earth’whichisthebestplacetolookforsignsoflifeoutsideofthesolarsystem .科学家响应, 这颗行星是earlyindicationssuggestithasanatmosphere是andsitswithinthe‘Goldilocks zone’whereitisneithertoohotnortocoldforliquidwate anditisonly 40 lightyearsfromearthmeaningthatitcouldbepossibletosendasignal .然后离地球只有40光年的距离,这意味着著不能发送信号。

“thisisthemostexcitingexoplaneti’veseeninthepastdecade,”saidleadauthorjasondittmannoftheharvard-smithsoniancend迪特曼说:“过去“wecouldhardlyhopeforabettertargettoperformoneofthebiggestquestsinscience– searchingforevidenceoflifebeyondearth .”theplanetw eamofscientistswhohavebeenstudyingdatafromeuropeanspaceobservatory’shighaccuracyradialview planetsearcher (harps ) 管理观测instrumentwhichlooksforregularchangesinbrightnessofstars,whichsuggestsaplanetispassingbyinorbing行星通过轨道的恒星亮度变化。the new world-dubbed lhs 1140 B- istentimesclosertoitsparentstarthanearthbutbecauseareddwarfisfarcoolerthanourownyellowdwarf thepla ezone .这个新发现的行星被称为LHS 1140b,离其母星的距离是地球和太阳距离的十分之一,但红矮星比身兼朱矮星的地球冷得多,因此这个行星还是位于居住带。“thepresentconditionsofthereddwarfareparticularlyfavourable– lhs 1140 bspinsmoreslowlyandemitslesshigh-energy radiation ilar low” ”addedteammembernicolaastudillo-defrufromgenevaobservatory,Switzerland .瑞士日内瓦天文台团队成员尼古拉? 阿斯图迪略? 德弗吕补充说:“这颗红矮星现在的状况非常不利,LHS 1140b的转速比其他类似的低质量恒星快,高能电磁辐射更低。

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” For life as we know it to exist,aplanetmusthaveliquidsurfacewaterandretainanatmosphere .我们理解的不存在生命的条件是行星需要液态地表水,享受大气, In this case, the planet’slargesizeandclosenesstoitssunmeansthatamagmaoceancouldhaveexistedonitssurfaceformillionsofyears which fed steam into the replenishing the planet with water .对这个行星来说,体积大,远离母星,意味着著表面可能不存在数百万年的岩浆海。海洋需要把蒸汽排放到大气中,为整个行星补充水分。astronomersestimatetheageoftheplanettobeatleastfivebillionyears据天文学家称,这颗行星的年龄至少为50亿年,比地球不存在的时间跨度更大。

他们还估计其直径是地球直径的1.4倍。butwithamassaroundseventimesgreaterthantheearth, and hence a much higher density是itimpliesthattheexoplanetisprobablymadeofrockwithadenseironcore .但其质量约是地球的7倍,密度远低于地球。

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