Core Insights - The research team from Peking University's School of Earth and Space Sciences has detected a new type of millisecond radio burst originating from the magnetic field of stellar sunspot regions using the "Chinese Sky Eye" (FAST) [1][3] - This discovery fills a gap in understanding the small-scale magnetic fields of stars outside the solar system and is significant for advancing research on space weather beyond the solar system [1][3] Group 1 - The solar magnetic field drives solar activity, which typically originates from localized strong magnetic field regions such as sunspots [3] - Similar magnetic activity phenomena exist on other late-type stars, with some stars (like active M-type stars) exhibiting more intense and frequent magnetic activities, significantly affecting the habitability of nearby planets [3] - Measuring small-scale magnetic fields of stars is crucial for exploring the origins of stellar magnetic activity and assessing potential space weather effects [3] Group 2 - Traditional methods for measuring stellar magnetic fields, such as Zeeman Doppler imaging, primarily provide information on the global large-scale magnetic fields of stars, lacking the ability to discern small-scale magnetic structures in sunspot regions [3] - The high sensitivity radio observations from the "Chinese Sky Eye" offer a new complementary approach to optical methods for detecting and studying sunspots [3] - The research team is also utilizing FAST observations to explore young solar-type stars, brown dwarfs, and stellar-planet interaction processes, which will further enhance understanding of stellar magnetic activities and their driven exoplanetary space weather phenomena [3]

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]