1 Herschel计划概况Herschel是欧洲空间局(ESA)的一个基础任务,执行该任务的科学有效载荷由主调查国提供,其中包括美国航空与航天管理局(NASA)所作出的贡献。作为在远红外和亚毫米波长处探索宇宙的一个天文学任务,Herschel宇宙飞船将容纳一架3．5mm的望远镜以便从太阳/地球的拉格朗日区(L2)进行观测,该区位于地球轨道之外的1．5×10~6km处。这种以被动方式致冷的望远镜将把辐射聚焦到三台低温致冷的仪器中, 1 Herschel Program Overview Herschel is a foundational mission of the European Space Agency (ESA) and the scientific payload for this task is provided by the main investigating country, including the contribution made by NASA. As an astronomical mission to explore the universe at far-infrared and sub-millimeter wavelengths, the Herschel spacecraft will house a 3.5-mm telescope for observation from the Sun / Earth Lagrange area (L2), located in Earth’s orbit Outside the 1.5 × 10 ~ 6km Department. This passive cooling of the telescope will focus the radiation into the three low-temperature refrigeration equipment,