美航宇局将遥控目前正在轨道上飞行的国际日地探险者(ISEE)-3飞过月球,以获得月球重力加速度,从而拦截贾可比尼一津纳(Giacobini-Zinner)彗星(以下简称彗星)。航宇局十年前就曾企图进行拦截彗星的首次空间飞行。这次之所以决定将重约半吨的ISEE-3转用于1985年9月的彗星拦截飞行,是基于以下三个因素: 1.深空探测的必要性——由卫星直接进行彗星探测是一项至关紧要的科学目标。了解彗星的本质以及组成成分被看作是了解 NASA will remotely fly ISEE-3, currently flying on orbit, over the moon to gain lunar gravitational acceleration, thus intercepting comet Giacobini-Zinner (hereinafter referred to as Comet ). The space agency attempted to intercept a comet’s first space flight ten years ago. The decision to divert approximately half a ton of ISEE-3 to comet interceptor flights in September 1985 is based on the following three factors: 1. Necessity of deep space exploration - direct comet detection by satellites A crucial scientific goal. Understanding the nature and composition of comets is seen as understanding