He also included a variety of voice and other sound bites in his music, including clips from the Apollo lunar missions
and from the movie, "It's a Wonderful Life.
To create trajectories for the Apollo lunar missions
, for instance, engineers calculated how Earth's gravity would affect the spacecraft at the beginning of its trip and how the moon's gravity would affect the craft toward the end.
According to Jim Lovell, Commander of multiple Apollo Lunar Missions
, this book should appeal to anyone who has felt the thrill of aviation in their veins.