APOLLO 8 ~ FIRST HUMAN SPACE FLIGHT 1371 ZIP CODE BLOCK OF 4 X 6 US Postage Stamps

Zip Code Block of 4 stamps; Apollo 8, the second manned mission in the American Apollo space program, was the first human spaceflight to leave Earth orbit; and the first crewed voyage to return to Earth from the Moon. After launching on December 21, 1968, Apollo 8 took three days to travel to the Moon. It orbited ten times over the course of 20 hours. Apollo 8's successful mission paved the way for Apollo 11 to fulfill U.S. President John F. Kennedy's goal of landing a man on the Moon before the end of the 1960s.