What is astronout png?

I am sorry, as an AI language model, I do not have access to images. However, an astronaut PNG image would be a graphic file format with a transparent background that showcases an astronaut. PNG stands for Portable Network Graphics and it is a popular format to store images on the internet as it compresses images without losing quality. An astronaut is a person who is trained to travel in a spacecraft and explore outer space. They undergo extensive training and preparation to perform scientific experiments, conduct spacewalks, and operate advanced equipment on various space missions.