SOLAR SYSTEM

Detailed explanation-1: -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-2: -It was the first satellite in a series of four satellites as part of the Sputnik program of the former Soviet Union and was planned as a contribution to the International Geophysical Year . Three of these satellites (Sputnik 1, 2, and 3) reached Earth orbit.

Detailed explanation-3: -Bottom line: Explorer 1 was the first satellite launched by the United States. It flew into Earth orbit on a Jupiter-C rocket on January 31, 1958. It gave the U.S. a big boost in the early days of the U.S.-Soviet space race.

Detailed explanation-4: -On October 4, 1957, the Soviet Union launched the earth’s first artificial satellite, Sputnik I. The successful launch came as a shock to experts and citizens in the United States, who had hoped that the United States would accomplish this scientific advancement first.