A reader can best combine the information in the excerpts to understand that the Apollo 11 spacecraft was manned by a crew of only two astronauts with the last names Armstrong and Aldrin. understand that the Apollo 11 crew member Collins stays in orbit around the moon as a safety measure while Armstrong and Aldrin try to land. understand that the Apollo 11 crew was prepared for and capable of calling off the moon landing if they felt that they needed to for any reason. understand that the Apollo 11 crew members climbed into two separate space modules one day after entering into orbit around the moon.