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Hace 11 horas · AD An extreme oxygen-rich red hypergiant that has experienced two dimming periods in the 20th century where the star became dimmer by up to 2.5 magnitudes. Potentially the largest known star in the Milky Way. AH Scorpii: 1,411 ± 124: AD RSGC1-F06 1,382 +298 −384: L/T eff: S Persei: 1,364 ± 6: AD CD-33 12241: 1,359: L/T eff: NML Cygni ...
Hace 11 horas · The tributary relations between Jurchens and Goryeo began to change under the reign of Jurchen leader Wuyashu (r. 1103–1113) of the Wanyan clan. The Wanyan clan was intimately aware of the Jurchens who had submitted to Goryeo and used their power to break the clans' allegiance to Goryeo, unifying the Jurchens.
