Medicine & TechnologyThis stunning nebula, called RCW 34 and visualized by the European Southern Observatory's (ESO) Very Large Telescope (VLT), is home to young stars that heat gases, causing them to expand outward. In this brightest area of the nebula heated hydrogen bursts into the vacuum outside the gas cloud, "uncorking" the nebula. This kind of process is called a champagne flow, and the entire area provides rich fodder for astronomers as it continuously produces new, brilliant stars.