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Box Nebula NGC 6445: 1786 4.5 11.2 Sagittarius: Eye of Sauron Nebula M 1-42: 10 14 Sagittarius
A nebula that is visible to the human eye from Earth would appear larger, but no brighter, from close by. [6] The Orion Nebula, the brightest nebula in the sky and occupying an area twice the angular diameter of the full Moon, can be viewed with the naked eye but was missed by early astronomers. [7]
The Zone of Avoidance (ZOA, ZoA), or Zone of Galactic Obscuration (ZGO), [1] [2] is the area of the sky that is obscured by the Milky Way. [ 3 ] The Zone of Avoidance was originally called the Zone of Few Nebulae in an 1878 paper by English astronomer Richard Proctor that referred to the distribution of " nebulae " in John Herschel 's General ...
Ja — Jacoby (planetary nebulae) (for example: Jacoby 1 at 15:23 / +52°14' in Boötes) JaFu — Jacoby-Fullton (planetary nebulae) JAn — John A. Anderson (double stars) Jc — William Stephen Jacob (double stars) Jef — H.M. Jeffers (double stars) Jn — Jones (planetary nebulae) (for example: Jones 1 at 23:36 / +30°28' in Pegasus)
The Ring Nebula is located in the lower right of the image Gum Nebula: 809–950 ly (248–291 pc) [18] [19] Emission nebula: Extends about 36° of the sky Bubble Nebula (NGC 6822) 758 ly (232 pc) [20] [21] [22] H II region: The Bubble Nebula is located in the upper left of the image NGC 6188: 600 ly (180 pc) [23] Emission nebula: NGC 592
The temperatures observed in HH objects are typically about 9,000–12,000 K, [22] similar to those found in other ionized nebulae such as H II regions and planetary nebulae. [23] Densities, on the other hand, are higher than in other nebulae, ranging from a few thousand to a few tens of thousands of particles per cm 3 , [ 22 ] compared to a ...
The Rho Ophiuchi cloud complex with its main dark nebula Lynds 1688, speckled with its pinkish young stellar objects, just left to HD 147889 surrounded by IC 4603 as the bright area at the center. The red area called Sh2-9 has Sigma Scorpii at its center, and Antares is just outside the picture at the bottom.
The apparent size of the nebula is 0.8'3 or 0.79'4 (0.795 ± 0.005'), which, taking into account the distance calculations, equates to an actual size of 1, 26 ± 0.26 al. Observations show the expanding CO shell is pretty much continuously distributed around the minor axis waist and the nebula is tilted to the plane of the sky. The shell is ...