Answer:
1. NASA was established.
2. Yuri Gagarin orbited Earth. 
3. The United States launched Explorer 1.
Explanation: 
The U.S. launched a satellite, Explorer 1 in 1958 and President Eisenhower signed a public order, creating NASA. 
Soviet cosmonaut Yuri Gagarin became the first person to orbit Earth in 1961, traveling in Vostok 1.