You try to, typically an aurora shot on an average night is 3-5 seconds. When it starts moving around even less because you want to capture the motion and if you leave the shutter open it just turns into a blob of color. This specific photo the exposure time was 6/10th of a second, and I had to lower the whites and highlights considerably in post to keep them from blowing out. When the aurora gets this bright, it’s like pointing your camera at a full moon basically.