To find the distance of the stars which are so much farther than our solar system we use the unit ‘light year to measure the distance from the earth. There are many stars outside the solar system which are much bigger than the sun. Hence we can say that not only the sun but the entire star can be said as a self luminous body. Lots of reactions happen which helps the sun to generate its own light. So in case of the sun, It can be called a self luminous body because due to maximum amount of presence of hydrogen, sulphur like gases it leads to the formation of light hence sun do not require any source to glow. When we are talking about electric bulbs it takes electrical energy to glow, It itself does not glow when the switch is off. A self-luminous light source is disclosed having a light-permeable shell, a body disposed within the shell, defining a space between the shell and body, a member connecting the shell and body, radioactive gas disposed in the space, and a phosphor coating on at least one surface of the shell and body. Moon takes the sun’s light to glow during the night the moon does not have its own source to prepare heat.Įarth is also not the example of the luminous bodies. Define star, constellation Star: A self-luminous celestial body consisting of a mass of gas held together by its own. The words self luminous bodies are those bodies that produce light of their own or simply it can be said as those bodies which generate heat on their own and glow using their own light.Īs we all that many of the bodies glow using heat of the other source and moon is the simplest example or natural example we can take.
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