(CNN) – Astronaut Scott Carpenter died on Thursday at the age of 88.
Carpenter was one of the Mercury seven astronauts and was the backup pilot for John Glenn.
In 1962, he became the fourth American in space and the second American to orbit the Earth.
Carpenter was in a hospice in Colorado when he died.
NASA Administrator Charlie Bolden said, "We have lost a true pioneer…we will miss him greatly."
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