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Hace 2 horas · Yellow stars – hydrogen less strong, but evident metallic lines, such as the Sun, Arcturus, ... On the other extreme, dwarfs of less than half the mass of the Sun (spectral type M) are likely to tidally lock planets within their habitable zone, along with other problems (see Habitability of red dwarf systems).
Hace 1 día · Sun Yat-sen and revolutionaries debated reform officials and constitutional monarchists such as Kang Youwei and Liang Qichao over how to transform the Manchu-ruled empire into a modernised Han state. After the deaths of the Guangxu Emperor and Cixi in 1908, Manchu conservatives at court blocked reforms and alienated reformers and local elites alike.
