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Pickering's Triangle is much fainter and has no NGC number (though 6979 is occasionally used to refer to it). It was discovered photographically in 1904 by Williamina Fleming (after the New General Catalogue was published), but credit went to Edward Charles Pickering, the director of her observatory, as was the custom of the day.
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.
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An example of light exhibiting sub-Poissonian statistics is squeezed light. Recently researchers have shown that sub-Poissonian light can be induced in a quantum dot exhibiting resonance fluorescence. [5] A technique used to measure the sub-Poissonian structure of light is a homodyne intensity correlation scheme. [6]
The Pickering scale is a scale of rating astronomical seeing, the blurring of images caused by atmospheric turbulence. [1] [2] The scale was developed by William H. Pickering (1858–1938) of Harvard College Observatory, using a 5" (13 cm) refractor. [3] [4] Seeing of 1 to 3 is considered very poor, 4 to 5 is poor, 6 to 7 is good, and 8 to 10 ...
The Pickering series (also known as the Pickering–Fowler series) consists of three lines of singly ionised helium found, usually in absorption, in the spectra of hot stars like Wolf–Rayet stars. The name comes from Edward Charles Pickering [ 1 ] and Alfred Fowler . [ 2 ]
Xanathar's Guide has a few class-specific elements that can help like tables for a bard's worst performance or the vice a rogue likes to indulge in, in between adventures. It also has a big section full of tables that determine important character details like siblings, upbringing and other points that can help sketch a character backstory ...
This is a list of official Dungeons & Dragons adventures published by Wizards of the Coast as separate publications. It does not include adventures published as part of supplements, officially licensed Dungeons & Dragons adventures published by other companies, official d20 System adventures and other Open Game License adventures that may be compatible with Dungeons & Dragons.