Such as photos of nebulas or galaxies. I remember something about using filters of different gases but that’s it.
In: Technology
Most photos of nebulas or galaxies are made using light our eyes can’t see (like infrared or UV).
Their “colors” are remapped to colors we can see, so we can actually look at them. This is an artistic process as there is no “correct” way to map colors we can’t perceive to color we can, which is why space photos are usually that colorful.^[1]
Some pictures taken using visible light also have their colors remapped, just so that they look better. (There is nothing special about visible light -beside the fact that we can see it- so the process makes sense for it too).
[1] In some cases you can still find raw version of these images, without the recoloring, but these are just arrays of values, so you’ll have to remap them yourself, or just use them as is.
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