1987年4月24日,苏联质子号火箭从丘拉坦发射场起飞后,卫星进入了一条无用的轨道。这是质子号火箭在三个月中发生的第二次事故。这次事故共损失了1.5～2亿美元。至此,世界上所有的大型发射器——美国的航天飞机、大力神和宇宙神火箭、欧洲的“阿里安”、以及苏联的质子号火箭都已停止发射,进行事故调查。这次事故损失了3颗全球导航卫星:宇宙1838、1839及1840号。这次失败将进一步挫败苏联 On April 24, 1987, after the Soviet Proton rocket took off from the Churat Tan launch site, the satellite entered a useless orbit. This is the second accident that Proton rocket took in three months. The accident lost a total of 1.5 to 200 million US dollars. So far, all the world’s large launchers - the U.S. space shuttle, Hercules and Space God rockets, the European “Annian” and the Soviet Proton rocket have all been stopped for an accident investigation. The incident lost three global navigation satellites: Universe 1838, 1839 and 1840. This failure will further defeat the Soviet Union