http://hubblesite.org/reference_desk/faq/answer.php.cat=topten&id=93 So, I found out that the images taken by the Hubble Space Telescope are not colored but black and white and colors are added to them later. I thought that the way you figure out what colors are present in your object(s) of interest is by looking at its spectrum. But how do you find those if you don't have a camera capable of recording colors? Is it the case that the imager in the Hubble is black and white, while the spectrometer is not? And we use the information we get from the spectrometer to fill in the colors on the images that we get from the imager?