FIRST ORBITAL FLIGHTS:
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This success led to an escalation of the American space program, which unsuccessfully attempted to launch Vanguard 1 into orbit two months later. On January 31, 1958, the US successfully orbited Explorer I on a Juno rocket. In the meantime, the Soviet dog Laika became the first animal in orbit on November 3, 1957
FIRST HUMAN IN SPACE
Yuri Gagarin
The first human spaceflight was Vostok 1 (Sunrise 1) , carrying 27 year old cosmonaut Yuri Gagarin on April 12, 1961. The spacecraft completed one orbit around the globe, lasting about 1 hour and 48 minutes. Gagarin's flight resonated around the world; it was a demonstration of the superior Soviet space program and it opened an entirely new era in space exploration - manned space flights. The U.S. launched its first man into space within a month of Gagarin's flight with the first Mercury flight, by Alan Shepard. However, orbital flight was not achieved by the United States until John Glenn's flight nearly a year later. China launched its first taikonaut into space 42 years later, with the flight of Colonel Yang Liwei aboard the Shenzhou 5 (Spaceboat 5) spacecraft.
After the first 20 years of exploration, focus shifted from one-off flights to renewable hardware, such as the Space Shuttle program, and from competition to cooperation as with the International Space Station. From the 1990s onwards, private interests began promoting space tourism. Larger government programs have advocated manned missions to the Moon and possibly Mars sometime after 2010.