The greater the greater the luminosity of an object, the brighter it appears. An object can be very luminous in multiple wavelengnths of light, from visible light, x-rays, ultraviolet, infrared, microwave, to radio and gamma rays, It often depends on the intensity of the light being given off, which is a function of how energetic the object is.
In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object. As a term for energy emitted per unit time, luminosity is synonymous with power.. In SI units luminosity is measured in joules per second or watts.Values for luminosity are often given in the terms of the luminosity of the Sun, L ⊙.
The difference between luminosity and apparent brightness depends on distance. Another way to look at these quantities is that the luminosity is an intrinsic property of the star, which means that everyone who has some means of measuring the luminosity of a star should find the same value.
The luminosity of his poetry is unequaled. something luminous. Astronomy. the brightness of a star in comparison with that of the sun: the luminosity of Sirius expressed as 23 indicates an intrinsic brightness 23 times as great as that of the sun. Also called luminosity factor.
Luminosity: Luminosity, in astronomy, the amount of light emitted by an object in a unit of time. The luminosity of the Sun is 3.846 × 1026 watts (or 3.846 × 1033 ergs per second). Luminosity is an absolute measure of radiant power; that is, its value is independent of an observer’s distance from an object.
The luminosity of an object is a measure of its intrinsic brightness and is defined as the amount of energy the object emits in a fixed time. It is essentially the power output of the object and, as such, it can be measured in units such as Watts. However, astronomers often prefer to state luminosities by comparing them with the luminosity of the Sun (approximately 3.9 × 10 26 Watts).
Home » Astronomy » Luminosity : Luminosity . Luminosity The luminosity of an object is a measure of its intrinsic brightness and is defined as the amount of energy the object emits in a fixed time. It is essentially the power output of the object and, as such, it can be measured in units such as Watts.
The luminosity of any star is the product of the radius squared times the surface temperature raised to the fourth power. Given a star whose radius is 3 solar and a surface temperature that’s 2 ...
Brightest Stars: Luminosity & Magnitude. ... the distance dependence factored out — that is of most interest to us as astronomers," stated an online course on astronomy from the University of ...
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