Luminous body is spelled /ˈluːmɪnəs ˈbɒdi/. According to IPA, the first syllable is pronounced with the long /uː/ sound, while the second syllable is pronounced with the /ɪ/ short vowel. The "m" and "n" sounds are also clearly distinct. The second word "body" is spelled using the British English pronunciation, with the short "o" sound being pronounced as /ɒ/. Overall, the spelling of luminous body accurately reflects how it is pronounced phonetically.
A luminous body is an entity that emits or radiates light in the form of electromagnetic radiation. It refers to any celestial or terrestrial object that possesses the ability to produce its own light, either through the process of combustion or by emitting radiation from its own physical structure. This term is commonly used in astronomy to describe various objects and phenomena in the universe.
In the context of astronomy, a luminous body primarily refers to celestial bodies such as stars, which generate and emit light through nuclear fusion reactions occurring within their cores. Stars are gigantic luminous bodies that shine due to the immense heat and pressure produced by the fusion of hydrogen into helium.
Additionally, other astronomical objects like pulsars, quasars, galaxies, and nebulae, can also be considered luminous bodies as they emit varying intensities of visible light, infrared light, or other types of electromagnetic radiation.
On Earth, luminous bodies can include sources of artificial light, such as lamps, light bulbs, or lanterns, as well as natural sources like fireflies and bioluminescent organisms. These objects or organisms produce light through chemical reactions or through bioluminescence, which is the emission of visible light resulting from the reaction of certain chemicals within living organisms.
In summary, a luminous body is any entity, celestial or terrestrial, that emits light either from its own physical structure or through a combustion process.
The word "luminous" comes from the Latin word "luminosus", which means "full of light" or "shining". It is derived from the Latin word "lumen", meaning "light". The term "body" in this context refers to any celestial object, such as stars, planets, or moons. So, when combined, "luminous body" simply means a celestial object that emits light or shines brightly.