system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do we get other pictures of far away galaxies that we can not see?
gpt
Long exposures with cameras using powerful telescopes. 

Many galaxies and other celestial objects are too faint to see with the eye, or with a regular camera. But if you let a camera have a long enough exposure these faint objects reveal themselves in the picture taken by the camera.