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科学家发现“超级地球”:质量大约是地球的10倍,位于一个适合液态水存在的区域,可能存在类地生命
Mei Ri Jing Ji Xin Wen· 2025-06-04 00:56
Core Viewpoint - An international research team led by the Yunnan Observatory of the Chinese Academy of Sciences has discovered a super-Earth, Kepler-725c, located in the habitable zone of a sun-like star, which may have conditions suitable for life [1][3]. Group 1: Discovery Details - The super-Earth Kepler-725c has a mass approximately 10 times that of Earth [3]. - It orbits a G9V-type host star named Kepler-725, which is younger than the Sun at 1.6 billion years old and exhibits more intense magnetic activity [3]. - The planet completes an orbit around its host star in about 207.5 days, similar to Earth's orbital period [3]. Group 2: Research Methodology - The discovery utilized a technique called transit timing variation (TTV) to infer the existence of the super-Earth by observing the slight deviations in the orbital period of another transiting planet in the Kepler-725 system [4]. - This method represents the first application of TTV inversion technology to identify such planets in the habitable zones of sun-like stars [3][4]. Group 3: Implications and Future Research - The finding opens new avenues for detecting Earth-like exoplanets and positions TTV inversion as a powerful tool for discovering "invisible planets" in habitable zones [6]. - The research supports 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 technical support [6]. - The Yunnan Observatory plans to apply this technology to more exoplanet systems to further investigate the conditions for Earth-like life [6].