Not while Neil Armstrong and Buzz Aldrin were down on the surface of the moon. Michael Collins remained in orbit around the moon. Once every forty-odd minutes (

Not while Neil Armstrong and Buzz Aldrin were down on the surface of the moon. Michael Collins remained in orbit around the moon. Once every forty-odd minutes (the duration of his lunar orbit), he was separated by the entire diameter of the moon (over 3400 km) from the nearest two humans, and completely cut off from radio contact with anyone.