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A key advance was the invention of the first liquid-fuelled rocket in 1926 by the American Robert Goddard in Auburn, Massachusetts. Goddard is considered to be one of the fathers of the modern rocket era.
The first man in space was the Soviet cosmonaut Yuri Gagarin, who made a single orbit of the Earth on April 12, 1961. The first US astronaut into space was Alan Shepard, who m â¦ ade a suborbital flight on May 5, 1961.