Usually it's gotten around because astronomical images are stacks of many integrations, and then you dither around. If you take 10 5-minute exposures, for examp

Usually it's gotten around because astronomical images are stacks of many integrations, and then you dither around. If you take 10 5-minute exposures, for example, and you dither around correctly, you might have a bunch of pixels with 9/10 or 8/10 data values... then you stack the images and weight those pixels accordingly.