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The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. [ 4 ] It constitutes the visible portions of the Cygnus Loop , [ 5 ] a supernova remnant , many portions of which have acquired their own individual names and catalogue identifiers.
These three luminous areas make up the Eastern Veil. NGC 6992 is an HI shell located along the north-eastern edge of the loop at J2000 RA 20 h 56 m 19.0 s Dec +31° 44′ 34″. [4] NGC 6995 is located farther south at J2000 RA 20 h 57 m 10.7 s Dec +31° 14′ 07″, [5] and IC 1340 even farther south at J2000 RA 20 h 56 m 12.0 s Dec +31° 04 ...
Veil Nebula: 100–130 ly (31–40 pc) [47] Supernova remnant: Located in the Cygnus Loop: NGC 3576: 100 ly (31 pc) [48] Emission nebula: N41: 100 ly (31 pc) [49] Emission nebula: The following well-known nebulae are listed for the purpose of comparison. Orion Nebula: 20 ly (6.132 pc) [50] Diffuse Nebula: The closest major star formation region ...
Crescent Nebula (Caldwell27) captured by David Rousseau from an urban location in Québec, Canada using Ha and OIII narrowband filters. The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth.
VEI and ejecta volume correlation. The volcanic explosivity index (VEI) is a scale used to measure the size of explosive volcanic eruptions.It was devised by Christopher G. Newhall of the United States Geological Survey and Stephen Self in 1982.
The point at which rare species cease to be sampled has been termed Preston's veil line. As the sample size increases Preston's veil is pushed farther to the left and more of the normal curve becomes visible [2] [10] (Figure 6). Williams' moth data, originally used by Fisher to develop the logseries distribution, became increasingly lognormal ...