Final answer:
Yuri Gagarin was the first cosmonaut to journey into outer space in 1961.
Step-by-step explanation:
The Soviet cosmonaut who made history as the first person to journey into outer space is Yuri Gagarin. His historic spaceflight occurred in the year 1961. Gagarin's Vostok 1 spacecraft completed one orbit around the Earth in a little over 108 minutes.
Learn more about Yuri Gagarin's historic spaceflight