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The age of space exploration began in 1957, when Sputnik 1 was launched by the Soviet Union. The first successful manned flight took place in 1961, when Yuri Gagarin was shot into space. This triggered the ‘space race’ between the USA and the USSR, culminating in the moon landing in 1969. After this, there was something of an anticlimax and the number of manned missions dropped off, largely due to the end of the space race. Nevertheless, space probes like Pioneer and Voyager continued to be sent out in order to explore the neighboring planets such as Mars and Venus. The American shuttle and the Russian Mir Space Station were also ground-breaking, as they developed the practicalities of the space travel.