An astronomer wants to observe a cloud of dust in a relatively close part of the Galaxy. Unfortunately, this dust cloud is not located in the direction of a crowded region of stars. What instrument would be the most help in finding this cloud. Group of answer choices a visible-light telescope (like the Keck) with a camera or CCD detector a spectroscope that can search for the line radiation from highly ionized atoms an x-ray telescope in orbit around the Earth a sensitive infra-red telescope in orbit around the Earth