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The Gum Nebula or Gum 12 is an emission nebula that extends 36° across the night sky and is actually the very large 12,000-year-old Vela supernova remnant. It mainly consists of red hydrogen and blue doubly ionized oxygen. This is a bi-colour image with H-a mapped to red and OIII mapped to both green and blue.
The NGC 6357, commonly known as the Lobster Nebula, spans about 400 light years and lies about 8,000 light years away from the Earth, toward the constellation of the Scorpion. Due to the nature of light collected, colours in this image are arbitrary, with hot hydrogen shown in red, and oxygen and sulphur in blue and green respectively. However, extreme care was taken to preserve the faintest structures and intricacies within the nebulosity when stitching the data together. Data for this narrowband image was acquired over three nights in June 2018 from the photographer’s small backyard in the tropical North Queensland.
NGC 7293, also known as the Helix Nebula is one of the brightest and closest examples of a planetary nebula, a gas cloud created at the end of the life of a sun-like star. This image is the result of narrowband data on the Helix Nebula, gathered over two months from suburban Melbourne, Australia.
This image was heavily inspired by Ken Crawford's photo of the Horsehead Nebula which perfectly showcased the hydrogen filaments located within the blue reflection nebula, NGC 2023, just below the Horsehead.