that are fainter than what is visible to the unaided eye, allowing large areas of the sky to be covered by

that are fainter than those visible for the unaided eye allows for large areas of the sky to be covered with

fainter than what is visible for the unaided eye allows that large areas of the sky are covered by

fainter than that visible to the unaided eye, allowing large areas of the sky to be covered with

fainter than those visible to the unaided eye allows large areas of the sky to be covered with