Final answer:
The historical context of the Apollo missions and lunar exploration forms the backdrop for discussing space travel licenses today. The last human visit to the moon was in 1972, and while no humans have been sent since, scientific interest remains high with several nations sending spacecraft to study the moon.
Step-by-step explanation:
The scenario describing Ron and Henrietta losing their licenses for independent space travel due to plans of building a waterpark on the moon is fictional. However, it opens the discussion about space travel and the historical context of lunar exploration. The last human mission to the Moon was in December 1972 during the Apollo program, which was a pivotal series of missions that marked the space race between the United States and the Soviet Union during the Cold War era. The Apollo missions ultimately resulted in American astronauts Neil Armstrong, Buzz Aldin, and Michael Collins making history with Apollo 11, when Armstrong and Aldrin took the first human steps on the lunar surface on July 20, 1969. Since then, space travel has evolved, but no nation currently has the capability to send humans to the moon. While the United States and China are developing the potential for future lunar landings, it has been over 50 years since humans last visited our celestial neighbor.