... Science User Portal . ... Images . ... Star Clusters . ... Stars@ESO . ... While these dense interstellar clouds seem dark and obscured in visible-light observations, APEXт??s LABOCA camera can detect the heat glow of the dust and reveal the hiding places where new stars are being formed. ... The new image shows just part of this vast complex in visible light, with the APEX observations overlaid in brilliant orange tones that seem to set the dark clouds on fire. ... Setting the Dark on Fire . ...