Помогите написать 5 предложений о Ю. А. Гагарине на английском

Gagarin is one of the famous persons in the world. He is the first man who flew in the space. It was unbelivibale. The first space ship with the cosmonaut Gagarin started its trip on the 12-th of April 1961. Gagarin was a pilot and he was chosen from the great number of the pilots, who wanted to be the first. The smile of Gagrin is well-known in the world.