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1.阅读下列材料,用一句话提取出主要信息。2016年9月15日22时04分,搭载着天宫二号空间实验室的长征二号FT2运载火箭在酒泉卫星发射中心点火发射。约575秒后,天宫二号与火箭成功分离,进入预定轨道,发射取得圆满成功。天宫二号空间实验室是在天宫一号目标飞行器备份产品的基础上改进研制而成,设计在轨寿命不小于2年,主要任务是接受载人飞船和货运飞船访问,开展空间科学实验和相关技术试验,验证空间站建造和运营相关关键技术。
1. Read the following materials, using a sentence to extract the main information. On September 15, 2016, at 22:04, the FT2 launch vehicle equipped with the space laboratory at the Temple of Heaven II was fired at the Jiuquan Satellite Launch Center. About 575 seconds later, the Temple of Heaven II successfully separated from the rocket and entered the scheduled orbit. The launch achieved a complete success. Tiangong-2 Space Laboratory was developed on the basis of the Tiangong-1 target vehicle backup product. The designed life of the Tiangong-2 spacecraft is not less than two years. The main task is to accept the visits of manned spacecraft and cargo spacecraft, carry out space science experiments and related Technical testing to validate key technologies related to the construction and operation of space stations.