50th Anniversary of Explorer 1
Explorer 1 was the first satellite launched by the United States when it was sent into space on January 31, 1958. Read the history, view images and videos, and learn more on the Explorer 1 site.
Explorer 1 was the first satellite launched by the United States when it was sent into space on January 31, 1958. Read the history, view images and videos, and learn more on the Explorer 1 site.
