NASA’s 1st flight to moon, Apollo 8, marks 50th anniversary on December 21, 2018.
It was the second manned spaceflight mission in the United States Apollo space program, was launched on December 21, 1968.
It became the first manned spacecraft to leave low Earth orbit, reach the Moon, orbit it, and safely return.
The 3-astronaut crew Frank Borman, James Lovell, and William Anders became the first humans to travel beyond low Earth orbit, see Earth as a whole planet, and enter the gravity well of another celestial body.