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.