The issue is that the multi-wavelength combined image doesn't correspond to RGB like the RAW output of DSLR or smartphone camera. The different bands received

The issue is that the multi-wavelength combined image doesn't correspond to RGB like the RAW output of DSLR or smartphone camera. The different bands received from spacecraft, rovers and (space-)telescopes are matched with red, green and blue, even though they're actually taken in near infrared, UV, or even X-ray spectra. The "truth" is that the images are only monochrome representations of recorded photons of different energies. Most people don't see near UV light for example and some images are taken in very narrow bands and then "stretched" into "full" RGB, etc. The point is that the recorded data doesn't correspond to the human vision apparatus (or at least not well) an thus any multi-colour representations are necessarily fabricated and sometimes don't even try to reflect what a human would have seen.