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The Eastern Veil (also known as Caldwell 33), whose brightest area is NGC 6992, trailing off farther south into NGC 6995 (together with NGC 6992 also known as "Network Nebula" [11]) and IC 1340; and Pickering's Triangle (or Pickering's Triangular Wisp ), brightest at the north central edge of the loop, but visible in photographs continuing ...
The visual portion of the Cygnus Loop is known as the Veil Nebula, also called the Cirrus Nebula or the Filamentary Nebula. Several components have separate names and identifiers, [2] [3] including the "Western Veil" or "Witch's Broom", the "Eastern Veil", and Pickering's Triangle.
Western part of Veil Nebula 'Witch Broom' Diffuse nebula: Cygnus: 20 h 45 m 38.0 s +30° 42′ 30″ 6981: Messier 72 Globular cluster: Aquarius: 20 h 53 m 27.9 s: −12° 32′ 13″ 10.0 6992: Eastern part of the Veil Nebula 'Banana Nebula' Diffuse nebula: Cygnus: 20 h 57 m +31° 30′ 6994: Messier 73 Asterism [7] Aquarius: 20 h 59 m: −12 ...
NGC 6992 (Eastern Veil Nebula – center) and NGC 6960 (Western Veil Nebula – upper right) photographed from a dark site. To the south of Epsilon Cygni is the Veil Nebula (NGC 6960, 6979, 6992, and 6995), a 5,000-year-old supernova remnant covering approximately 3 degrees of the sky - [66] it is over 50 light-years long. [4]
The Veil Nebula in Cygnus comprises several NGC/IC items: 6960 (the Witch's Broom), 6992/6995/IC1340 (Eastern Veil), 6974 (faint patch near north boundary) -- and the one I'm asking about: NGC 6979.
The Ring Nebula is located in the lower right of the image Gum Nebula: 809–950 ly (248–291 pc) [16] [17] Emission nebula: Extends about 36° of the sky Bubble Nebula (NGC 6822) 758 ly (232 pc) [18] [19] [20] H II region: The Bubble Nebula is located in the upper left of the image NGC 6188: 600 ly (180 pc) [21] Emission nebula: NGC 592
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The nebula's color depends on its chemical composition and degree of ionization. Due to the prevalence of hydrogen in interstellar gas, and its relatively low energy of ionization, many emission nebulae appear red due to strong emissions of the Balmer series. If more energy is available, other elements will be ionized, and green and blue ...