system
Given the following post, respond as if you're commenting on Reddit:
human
Why when we photograph the sky from earth do we see millions of stars that are lightyears away but every picture I have seen taken by astronauts in space the sky is black and starless?
gpt
It's purely incidental. You can find plenty of photos taken by astronauts where the stars are quite visible. You just don't see very many, because most photos are taken while a well-lit object is in the foreground of the shot, like the Earth, a spacewalking astronaut, or a piece of the ISS.

Under these conditions, taking a long exposure to also capture the stars would just white or blur out the shot.

I'll use an example. Stand under a street lamp, point your camera towards the sky, and try to capture both the light from the lamp and the stars. In all likelihood, the best you'll be able to do is a short exposure that captures the lamp and blackens the sky.