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【题目】2015年7月24日,美国国家航空航天局(NASA)发布消息,称发现编号为Kepler-452b的行星是至今为止发现的最接近地球的孪生星球,有可能拥有大气层和流动水。这颗类地行星与地球相似指数达到0.98,距离地球1400光年,绕着一颗与太阳非常相似的恒星运行。其所在星系恒星的质量比太阳多4%,亮度则要多出10%。NASA表示,Kepler-452b可以被称为地球2.0版本。据此完成下列各题。

【1】编号为Kepler-452b的行星不可能属于( )

A.总星系 B.银河系 C.河外星系 D.太阳系

【2】科学家推测Kepler452b可能适宜人类居住。是基于Kepler452b与地球( )

A.表面温度接近 B.大气厚度相同 C.大气成份相同 D.质量大小相同

【答案】

【1】D

【2】A

【解析】

试题分析:

【1】根据材料,编号为kepler452b的行星绕着一颗与太阳非常相似的恒星运行,所用不可能属于太阳系,该行星一定属于总星系,可能属于银河系或者河外星系,所以D正确。

【2】科学家推测kepler452b可能适宜人类居住,是基于kepler452b与地球相似指数达到0.98,可能是表面温度接近,材料表示与地球相似度高,并不是相同,所用不可能出现大气厚度相同、大气成分相同、质量大小相同的特征,所以A正确。

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