However, they did have a flight plan that included checklists, procedures, and scientific experiments. They were also equipped with manuals and charts to help them navigate and operate the spacecraft.
So, while there's no definitive answer to what they read first, it was likely something related to their mission objectives or the operation of the spacecraft.
It's also worth noting that the astronauts would have been extremely busy during their lunar orbit, focusing on critical tasks like:
* Monitoring systems: They needed to constantly check the status of the spacecraft and its systems.
* Navigating: They had to make sure they were on the right course and at the correct altitude.
* Preparing for landing: They had to practice the landing procedures and prepare for the descent to the lunar surface.
While reading might have been a way to relax during some downtime, it would have been a low priority during their first orbit of the Moon.
