来源：北京科学中心 审核专家：景海荣 北京天文馆研究员 近日，由中国科学院云南天文台牵头的国际研究团队，在一颗类似太阳的恒星周围发现一颗位于宜居带 的超级地球Kepler-725c。 恒星Kepler-725（中）、行星Kepler-725b（左）和利用TTV反演技术发现的"隐藏"在类太阳恒星宜居带 内的行星Kepler-725c。来源：云南天文台 这是在国际上首次利用凌星中间时刻变化反演技术在类太阳恒星的宜居带发现此类行星。 那么，这颗"超级地球"长啥样？"超级地球"和地球有什么不同？一颗适合人类生存的星球，应该长啥 样？ "超级地球"Kepler-725c "超级地球"不是特指某一颗星球，它的定义是基于质量特征，其质量通常在地球的2到10倍之间，但它 的半径可能达到地球的1.3至2.7倍。 本次发现的这颗"超级地球"围绕一颗名为Kepler-725的G9V型宿主恒星运行，它的质量大约是地球质量 的10倍。该宿主恒星的光谱型与太阳相似，但它比太阳年轻，年龄仅为16亿年，表面的磁场活动要比太 阳活动更为剧烈。 这颗"超级地球"位于Kepler-725的宜居带——一个适合液态水存在的区域，被认为是类地生命诞生的 ...

Core Insights - An international research team led by Gu Shenghong from the Yunnan Observatory of the Chinese Academy of Sciences has discovered a "super-Earth" named Kepler 725c, which is approximately 10 times the mass of Earth, located in the habitable zone of a sun-like star [1][2] Group 1: Discovery and Methodology - The discovery of Kepler 725c utilizes a new technique called Transit Timing Variation (TTV), which measures the timing of transits of another planet in resonance with the target planet, differing from traditional methods like the transit method and radial velocity method [1][2] - Kepler 725c orbits a G9V-type star, similar to the Sun, with an age of only 1.6 billion years and a more intense magnetic activity compared to the Sun [1] Group 2: Implications and Future Research - This discovery provides a new pathway for detecting exoplanets, establishing TTV as a powerful tool for finding "invisible planets" in the habitable zones of sun-like stars [2] - The findings support future space astronomy missions in China, such as the Chinese Space Station Telescope (CSST) and the Earth 2.0 project, by providing new observational targets and technological support [2] - The research is considered a significant advancement in the search for habitable exoplanets, bringing humanity closer to answering the age-old question of whether similar Earth-like planets exist [2]