How are these names: yuri gagarin,vostok 1,baikonur cosmodrome,neli armston,opportunity and curiosity,nasa. related to space exploration?

Yuri Gagarin was a Soviet cosmonaut. He was the first man in outer space. Vostok 1 was the first spaceship, which took a man (Yuri Gagarin) into outer space. Baikonur Cosmodrome is a cosmodrome from which the first spaceflight to outer space was made. It is located in Kazakhstan. Neil Armstrong was an American astronaut. He was the first man to walk on the Moon. Opportunity and Curiosity are names of two Mars rovers, vehicles driving on the Mars surface. NASA is the greatest space agency, which contributes a lot to space investigations.