NEBULA Meaning and
Definition
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A nebula is a vast and diffuse cloud-like formation consisting of various interstellar gases, dust particles, and stellar remnants. These formations are usually found in outer space, particularly in galaxies, and can vary greatly in shape, size, and composition. The term "nebula" derives from the Latin word for "cloud" or "mist."
Nebulae are classified into different categories based on their origins and characteristics. For instance, reflection nebulae are clouds of gas and dust that reflect the light emitted by nearby stars. These nebulae often appear blue in color due to the scattering of shorter wavelengths of light.
On the other hand, emission nebulae, also known as H II regions, are stellar nurseries where intense ultraviolet radiation from newly formed massive stars excites the surrounding hydrogen gas, causing it to emit light. These nebulae often display vibrant colors, such as red, pink, or green.
Another class of nebulae is the dark nebulae. These are dense regions consisting of gas and dust that block the light from background objects, making them appear as silhouette-like structures against the brighter areas of the cosmos.
Nebulae play a crucial role in the formation and evolution of stars and galaxies. Their intricate structures and vibrant colors have intrigued astronomers throughout history, leading to significant observations and discoveries about the universe we inhabit.
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1. A faint, foglike opacity of the cornea. 2. A class of oily preparations in the National Formulary, intended for application by atomization.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
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An appearance as of a light gauzy cloud amongst the stars, usually only seen through a telescope, often resolvable by a powerful instrument into clusters of stars; a white spot or slight opacity on the cornea.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
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Etymology of NEBULA
The word "nebula" has its roots in Latin. It comes from the Latin word "nebula", which means "mist" or "cloud". In ancient astronomical observations, nebulas were often described as hazy or cloudy objects in the night sky. Over time, the term "nebula" came to be associated with any celestial object that appeared as a diffuse or fuzzy patch of light. This Latin word has been adopted into various languages, including English, to describe these astronomical phenomena.
Similar spelling words for NEBULA
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