Noun
The word is derived from nebula
of Nebula
Source: Webster's dictionaryMany natural patterns, such as the arrangement of buds on a stem, accord with the series of Fibonacci numbers, and Fibonacci spirals are also observed in spiral nebulae. There are, moreover, no flying pigs ... Mary Midgley
We find them smaller and fainter, in constantly increasing numbers, and we know that we are reaching into space, farther and farther, until, with the faintest nebulae that can be detected with the greatest telescopes, we arrive at the frontier of the known universe. Edwin Hubble
The stars look the same from night to night. Nebulae and galaxies are dully immutable, maintaining the same overall appearance for thousands or millions of years. Indeed, only the sun, moon and planets - together with the occasional comet, asteroid or meteor - seem dynamic. Seth Shostak
Although these nebulae have different visibility at optical wavelengths, they are all bright sources of infrared emission, chiefly from dust within the nebulae. Source: Internet
At Auburn, his research focused on theoretical atomic physics, and his dissertation — Discovery of Enhanced Recombination in Astrophysical Environments and the Implications for Plasma Diagnostics — focused on the study of planetary nebulae. Source: Internet
Before their nature was understood, galaxies ("spiral nebulae") and star clusters too distant to be resolved as stars were also classified as nebulae, but no longer are. Source: Internet