二、国外月球以远深空探测的最新计划进入21世纪,各航天国家和组织制定了详细的月球以远深空探测长远发展计划,深空探测已成为世界航天活动的重要发展方向。1.美国进入21世纪,美国制订了多项包含月球以远深空探测任务的计划,主要包括:“与日共存计划”:该计划是NASA为研究与人类社会息息相关的日地空间环境而设立的太阳 Second, the latest plan for the deep exploration of foreign lunar distant air enters the 21st century. The space nations and organizations have formulated a detailed long-range development plan for the deep space exploration of the moon. Deep space exploration has become an important development direction of the world’s space activities. 1. The United States entered the 21st century and the United States has formulated a number of plans that cover the deep space exploration mission far from the moon, including: “The Plan for Co-existence with Japan”: NASA’s plan to study space-time environment closely related to human society The establishment of the sun