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消息指,根据安排,天宫二号空间实验室已完成全部拓展试验,计划于北京时间2019年7月19日择机受控离轨并再入大气层。
届时,天宫二号少量残骸将落入南太平洋预定安全海域(西经160度至90度、南纬30度至45度)。
资料显示,天宫二号是在天宫一号备份目标飞行器基础上改进而来的,由实验舱和资源舱组成,总长10.4米,舱体最大直径3.35米,起飞重量约8.6吨。