中文摘要：

2015年7月24日美国国家航空航天局（NASA）宣布开普勒望远镜找到了一颗与地球大小接近、位于一颗和太阳极为相似的恒星周围的＂可居住带＂里的行星——Kepler-452b.它的轨道公转周期为385天,距离主星的距离大约为1.05 AU,接受到的辐射比地球多约10%.这颗行星的主星有效温度为5757 K,光谱型与太阳相同,半径是太阳的1.11倍,年龄比太阳更老,约为60亿年.二者可以说是目前为止发现的最接近＂日-地＂系统的系外行星系统.Kepler-452b的质量还无法精确测量,只能根据经验关系推测质量为地球的5倍左右,可能是一颗＂超级地球＂.

英文摘要：

NASA announced the discovery of Kepler-452b detected by the Kepler space telescope. Its size is close to the Earth, and it locates in the habitable zone around a G-class star which is very similar to our Sun. The planet has an orbital period of 385 days and a semi-major axes of 1.05 AU, and receives 10% more flux than the earth. The host star has an effective temperature of 5757K, with the spectral type of G2. It is 11% larger and 1.5 Gyr older than the sun. The planetary system has the closest match to the earth. According to the mass-radius relation, Kepler-452b has a probable mass of 5 M , making it another ＂super-Earth＂. However, its accurate mass remain unknown.