虞喜 Traditional form: 虞喜 Pinyin (reading): Yú Xǐ Definitions: Yu Xi, Chinese astronomer (c. 270-345), known for discovering the earth's precession Characters: 虞 - anxious, concerned, worried 喜 - to love; to enjoy, to be happy; joyful, glad Traditional characters: 虞 - anxious, concerned, worried 喜 - to love; to enjoy, to be happy; joyful, glad