Soyuz 31
苏联航天计划 · 联盟-U · 1/5 号发射台
任务简介
联盟31号是第六次访问礼炮6号空间站的任务，搭载了EP-4乘组，他们拜访了长期驻留的联盟29号（EO-2远征）乘组。任务于1978年8月26日14:51:30 UTC开始，将指令长瓦列里·布科夫斯基和研究航天员/飞行工程师西格蒙德·雅恩（首位德国航天员）送入轨道。次日，他们与空间站对接。在站期间，乘组进行了多项科学实验。联盟31号乘组与联盟29号（EO-2远征）乘组交换了飞船，从而使EO-2乘组得以在轨停留更长时间。任务于1978年9月3日11:40:34 UTC安全返回地球。
原文
Soyuz 31 was the sixth mission to visit the Salyut 6 space station and carried the the EP-4 crew, which visited the long-duration Soyuz 29 resident crew. The mission began on August 26, 1978, 14:51:30 UTC, launching Commander Valery Bukovsky and Research Cosmonaut/Flight Engineer Sigmund Jähn, the first German cosmonaut, into orbit. They docked with the station the next day. During their stay on the station, crew conducted various scientific experiments. Soyuz 31 crew swapped vehicles with the Soyuz 29 (EO-2 expedition) crew, which allowed for a longer stay in orbit for EO-2. The mission concluded with a safe landing back on Earth on September 3, 1978, 11:40:34 UTC.
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