"The Earth had a very distinct and pretty halo. This halo could be clearly seen when looking at the horizon. It had a smooth transition from pale blue to blue, dark blue, violet and absolutely black. It was a magnificent picture," the spacefarer wrote.
Gagarin also described his preparation for the flight and activities during it up to the landing, shared the records achieved. The file also included an original black-and-white photo of him and his spacecraft.
The auction sale, titled Sotheby’s in Space, achieved a total of $3.8 million. Other items on the block ranged from US astronomer Neil Armstrong's lunar bag containing traces of moon dust that sold for $1.8 million to a Snoopy astronaut doll.