The green and red splotch in this image is the most active star-making galaxy in the very distant universe. Nicknamed Baby Boom, the galaxy is churning out an average of up to 4,000 stars per year. Red: star formation. Green: gas in the Baby Boom galaxy. Blue galaxies in the foreground that are not producing nearly as many stars. Yellow/orange: starlight from the outer portion of Baby Boom. The red blob to the left is another foreground galaxy that is not producing a lot of stars. Credit: NASA/JPL-Caltech/Subaru
