Astronomy and Space

Explorer 3

Explorer 3 (Harvard designation 1958 Gamma) was an American artificial satellite launched into medium Earth orbit in 1958. It was the second successful launch in the Explorer program, and was nearly identical to the first U.S. satellite Explorer 1 in its design and mission.

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See also

• ▸Commercial Lunar Payload Services
• ▸Cholecystectomy
• ▸Comet nucleus

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