SOLAR SYSTEM

Detailed explanation-1: -1: Apollo 11, a Walk on the Moon Kennedy announced the mission that would be NASA’s greatest achievement: America was going to the moon. In response, NASA initiated the Apollo space program.

Detailed explanation-2: -What Has NASA Done? When NASA started, it began a program of human spaceflight. The Mercury, Gemini and Apollo programs helped NASA learn about flying in space and resulted in the first human landing on the moon in 1969. Currently, NASA has astronauts living and working on the International Space Station.

Detailed explanation-3: -Explorer 1 became the first successfully launched satellite by the United States when it was sent to space on January 31, 1958. A quick response to the Soviet Union’s launch of Sputnik 1, Explorer 1’s success marked the beginning of the U.S. Space Age.

Detailed explanation-4: -The first successful human spaceflight was Vostok 1 ("East 1"), carrying the 27-year-old Russian cosmonaut, Yuri Gagarin, on 12 April 1961. The spacecraft completed one orbit around the globe, lasting about 1 hour and 48 minutes.

Detailed explanation-5: -But the mission was aborted when an oxygen tank in the service module ruptured April 13. The blast prompted the famous transmission, “Houston, we’ve had a problem.” The 3 astronauts who flew on Apollo 13, Fred Haise, John Swigert and Jim Lovell, are seen in this photo taken the day before launch #OTD in 1970.