... Credit Copyright: Nigel Sharp ( NSF ), FTS , NSO , KPNO , AURA , NSF Explanation: It is still not known why the Sun's light is missing some colors. ... The above spectrum was created at the McMath-Pierce Solar Observatory and shows, first off, that although our yellow-appearing Sun emits light of nearly every color , it does indeed appear brightest in yellow-green light. ... Since different types of gas absorb different colors of light , it is possible to determine what gasses compose the Sun. ...