Search results
Results from the WOW.Com Content Network
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
The Roman satirist Juvenal wrote in AD 82 of rara avis in terris nigroque simillima cygno ("a rare bird in the lands, and very like a black swan"). [6] He meant something whose rarity would compare with that of a black swan, or in other words, as a black swan was not thought to exist, neither did the supposed characteristics of the "rare bird" with which it was being compared.
Messier 18 or M18, also designated NGC 6613 and sometimes known as the Black Swan Cluster, is an open cluster of stars in the constellation Sagittarius. It was discovered by Charles Messier in 1764 and included in his list of comet -like objects. [ 8 ]
Stylised atom. Blue dots are electrons, red dots are protons and black dots are neutrons. Date: 14 February 2007: Source: Own work based on: of Image:Stylised Lithium Atom.png by Halfdan. Author: SVG by Indolences. Recoloring and ironing out some glitches done by Rainer Klute. Permission (Reusing this file)
The black swan was a literary or artistic image among Europeans even before their arrival in Australia. Cultural reference has been based on symbolic contrast and as a distinctive motif. The black swan's role in Australian heraldry and culture extends to the first founding of the colonies in the eighteenth century.
Image processing (Photoshop or Irfan view): Add canvas of about 5% to each side (test it, usually around 30 pixels) (Photoshop: Image:Canvas Size, relative, 10% width, 10% height) Save as a PNG black/white bitmap (color depth: 2) with transparent background.
The Rutherford model is a name for the first model of an atom with a compact nucleus. The concept arose from Ernest Rutherford discovery of the nucleus. Rutherford directed the Geiger–Marsden experiment in 1909, which showed much more alpha particle recoil than J. J. Thomson's plum pudding model of the atom could explain. Thomson's model had ...
A black swan (Cygnus atratus) in Australia. The black swan theory or theory of black swan events is a metaphor that describes an event that comes as a surprise, has a major effect, and is often inappropriately rationalized after the fact with the benefit of hindsight. The term is based on a Latin expression which presumed that black swans did ...