If you take images at wavelengths other than visible light, the image must be in FALSE COLOR, by definition!

Why are astronomers interested in wavelengths our eyes can’t see? Because different physical processes radiate at different wavelengths.

For example, on the left is a visible image (HST) of a dying star starting to release its layers out into space; notice that there is a dusty disk around the star buried inside. On the right is an infrared image (HST); the environment of this star looks quite different in infrared light, and we can use this information to study how stars transfer their material back into space.