M17 is also known as the Omega Nebula or Swan Nebula. It’s one of the largest star-forming regions in the galaxy. This Hubble image of a central portion of the nebula has been colorized to highlight certain wavelengths of light. Green represents oxygen while red reveals hydrogen and infrared light.
Image Credit: NASA, H. Ford (JHU), G. Illingworth (UCSC/LO), M. Clampin (STScI), G. Hartig (STScI), the ACS Science Team and ESA