When in 1958 was the Explorer 1 launched?
January 31
March 15
July 4
November 11
Answer
Explorer 1 was launched on January 31, 1958, making it the first artificial satellite launched by the United States into Earth orbit. The spacecraft was designed to study the upper atmosphere and cosmic rays, and it successfully completed its mission before reentering the Earth's atmosphere and disintegrating on April 31, 1958.
Exploring the Outer Limits: The James Van Allen Quiz
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