Gordon Cooper
Overview
 
Leroy Gordon Cooper, Jr. (March 6, 1927October 4, 2004), also known as Gordon Cooper, was an American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 aeronautical engineer, test pilot and NASA
NASA
The National Aeronautics and Space Administration is the agency of the United States government that is responsible for the nation's civilian space program and for aeronautics and aerospace research...

 astronaut
Astronaut
An astronaut or cosmonaut is a person trained by a human spaceflight program to command, pilot, or serve as a crew member of a spacecraft....

. Cooper was one of the seven original astronauts
Mercury Seven
Mercury Seven was the group of seven Mercury astronauts selected by NASA on April 9, 1959. They are also referred to as the Original Seven and Astronaut Group 1...

 in Project Mercury
Project Mercury
In January 1960 NASA awarded Western Electric Company a contract for the Mercury tracking network. The value of the contract was over $33 million. Also in January, McDonnell delivered the first production-type Mercury spacecraft, less than a year after award of the formal contract. On February 12,...

, the first manned space effort by the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. He was the first American to sleep in orbit, flew the longest spaceflight of the Mercury project, and was the last American to be launched alone into Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...

 orbit and conduct an entire solo orbital mission.
 
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