Cadetti dello spazio

The portrayal of astronaut training felt very authentic and immersive. I wonder if Heinlein drew from real experiences or did extensive research for this?

The relationships and mentorships felt very real and heartfelt. I’m curious if readers see this as the core of the story or just a backdrop to space adventure.

The characters often face tough choices that add depth to the story. Do others feel this adds to the realism or slows down the pacing?