 
<translate> Ka ba da rafi na sani sannan ka ba da amsa ta ƙarshe. Gasar sararin samaniya tana nufin gasar ƙarni na 20 tsakanin abokan hamayyar Cold War guda biyu, Tarayyar Soviet (USSR) da Amurka (Amurka), don mamaye ikon sararin samaniya. Ya samo asali ne daga tseren makaman nukiliya na makamai masu linzami tsakanin ƙasashen biyu da suka faru bayan Yaƙin Duniya na II, wanda aka taimaka ta hanyar fasahar makamai masu linzami na Jamus da ma'aikata daga shirin Aggregat. An yi la'akari da fifiko na fasaha da ake buƙata don irin wannan rinjaye a matsayin wajibi ne don tsaro na kasa, kuma alama ce ta ficewar akida. Gasar sararin samaniya ta haifar da ƙoƙari na farko don ƙaddamar da tauraron dan adam, ba tare da binciken sararin samaniya na Moon, Venus, da Mars ba, da kuma jirgin sama na mutum a cikin ƙasa da ƙasa da kuma zuwa wata.  Bisa ga wannan nassi, su wanene manyan iko biyu a lokacin tseren sararin samaniya na Cold War? <eng> Give a stream of consciousness and then the final answer. The Space Race refers to the 20th-century competition between two Cold War rivals, the Soviet Union (USSR) and the United States (US), for dominance in spaceflight capability. It had its origins in the missile-based nuclear arms race between the two nations that occurred following World War II, aided by captured German missile technology and personnel from the Aggregat program. The technological superiority required for such dominance was seen as necessary for national security, and symbolic of ideological superiority. The Space Race spawned pioneering efforts to launch artificial satellites, uncrewed space probes of the Moon, Venus, and Mars, and human spaceflight in low Earth orbit and to the Moon.

Based on this passage, who were the two superpowers during the cold war space race? 