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      M17 — The Omega / Swan Nebula
      Wallpaper author:
      Cassio Pieroni Trevisani

      12 May 2026

      M17 — The Omega / Swan Nebula

      M17 is one of the most striking star-forming regions in Sagittarius, glowing with intense emission from young, massive stars embedded within its clouds of hydrogen gas and dark dust. Also known as the Omega Nebula, Swan Nebula, or Horseshoe Nebula, this object reveals a dramatic mix of bright ionized gas, sweeping dust lanes, and faint extended nebulosity.


      In this image, I wanted to emphasize the contrast between the luminous blue-white central region and the surrounding warm, dusty structures. The darker lanes cutting through the nebula add depth and help reveal the complex, sculpted nature of this active stellar nursery.


      The field is filled with delicate filaments, faint outer gas, and dense pockets of dust, showing just how dynamic this region is. M17 is always a rewarding target to process because it combines strong structure, rich color, and subtle faint details across the frame.

      Dataset from which the image was processed

      M17

      1 credit

      Open
      Telescope Live
      CHI-2-CCD
      • Type of target
        ............................................................................................................................
        Emission Nebula
      • Camera
        ............................................................................................................................
        FLI PL16803
      • Target coordinates
        ............................................................................................................................
        RA 275.19583 Dec -16.16667
      • Hemisphere
        ............................................................................................................................
        Southern
      • Telescope location
        ............................................................................................................................
        Chile
      • Transient event
        ............................................................................................................................
        No
      • Observed on
        ............................................................................................................................
        07 May 2020 - 07 May 2020
      Filter
      Avg Exp (s)
      Total Exposure
      Subframes
      Halpha80040m3
      SII40020m3
      OIII60030m3

      M17 — The Omega / Swan Nebula