Explorer 1 | Wiki | Everipedia

Explorer 1 - Wikipedia

Explorer 1 was the first satellite of the United States, launched as part of its participation in the International Geophysical Year. The mission followed the first two satellites the previous year; the Soviet Union's Sputnik 1 and 2, beginning the Cold War Space Race between the two nations.

Explorer 1 Fast Facts | NASA

Explorer 1 | Overview | Fast Facts

Internet Explorer Facts for Kids

Windows Internet Explorer (IE, formerly Microsoft Internet Explorer, MSIE), is a series of graphical web browsers developed by Microsoft. It was included as part of the Microsoft Windows operating system, starting in 1995.

Explorer 1 Overview | NASA

Explorer and Early Satellites | NASA

Missions | Explorer 1

Explorer 1: The First U.S. Satellite

Explorer 19 - Wikipedia

Explorer 19 was an American satellite launched on December 19, 1963, as part of NASA's Explorers program. It was the third of six identical Explorer satellites launched to study air density and composition, and the second to reach orbit.