units, luminosity is measured in joules per second, or watts. In astronomy, values for luminosity are often given in the terms of the luminosity of the...

In astronomy, a luminosity function gives the number of stars or galaxies per luminosity interval. Luminosity functions are used to study the properties...

solar luminosity (L☉) is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars...

The Eddington luminosity, also referred to as the Eddington limit, is the maximum luminosity a body (such as a star) can achieve when there is balance...

In astronomy, a period-luminosity relation is a relationship linking the luminosity of pulsating variable stars with their pulsation period. The best-known...

as will the star's temperature and luminosity. The Sun, for example, is estimated to have increased in luminosity by about 40% since it reached the main...

yacht Luminosity — Ignite the Night!, a former Cedar Point amusement park show that was shown from 2012 to 2017. Luminosity function (astronomy), a function...

steadily increased in luminosity by 40% since it first became a main-sequence star. The Sun has also undergone periodic changes in luminosity that can have a...

classification Luminosity comparison: LS, L☉ - luminosity of the Sun Luminosity of certain object: Lacc - accretion luminosity Lbol - bolometric luminosity Mass...

In astrophysics, the mass–luminosity relation is an equation giving the relationship between a star's mass and its luminosity, first noted by Jakob Karl...

same spectral classification. He took this as an indication of greater luminosity for the narrow-line stars, and computed secular parallaxes for several...

higher than normal luminosity over some part of the electromagnetic spectrum with characteristics indicating that the luminosity is not produced by stars...

older Harvard spectral classification, which did not include luminosity) and a luminosity class using Roman numerals as explained below, forming the star's...

the definition of spectral luminosity classes, with class I referring to supergiant stars. The same system of MK luminosity classes is still used today...

Planetary nebula luminosity function (PNLF) Globular cluster luminosity function (GCLF) Surface brightness fluctuation (SBF) In galactic astronomy, X-ray bursts...

giving a relatively modest luminosity of 90,000 L☉. Two years later, a new calculation for finding the bolometric luminosity by fitting the Spectral Energy...

(November 1997). "Luminosity and related parameters of δ Scuti stars from HIPPARCOS parallaxes. General properties of luminosity". Astronomy and Astrophysics...

intrinsic luminosity, its distance, and the extinction reducing its brightness. The absolute magnitude (M) describes the intrinsic luminosity emitted by...

In astronomy, absolute magnitude (M) is a measure of the luminosity of a celestial object on an inverse logarithmic astronomical magnitude scale; the more...

working assumptions in stellar astronomy. The Italian astronomer Geminiano Montanari recorded observing variations in luminosity of the star Algol in 1667...

remains, contributing to the increased luminosity, which will eventually reach more than 1,000 times its present luminosity. When the Sun enters its red-giant...

times the solar luminosity. At metallicity Z = 0.01 the luminosity is 1.34 times solar luminosity. At metallicity Z = 0.04 the luminosity is 0.89 times...

bolometric luminosity in multiples of the luminosity of the Sun (L☉) and the bolometric absolute magnitude. As with all magnitude systems in astronomy, the...

depends on its surface luminosity density, i.e., its luminosity emitted per unit surface area. In visible and infrared astronomy, surface brightness is...

star sensor. The X-ray luminosity of Lx = 1031 erg·s−1 (1024 W) is four orders of magnitude above the Sun's X-ray luminosity. Coronal stars, or stars...

essentially white when seen with the naked eye. It has a luminosity over 10,000 times the luminosity of the Sun, is eight times as massive, and has expanded...

of the luminosity based on an assumed distance of 1.5 kpc (4,900 ly) gave luminosities between 200,000 and 560,000 times the Sun's luminosity (L☉). This...

star there is a dimming in the luminosity of the host star that can be measured. Larger planets make the dip in luminosity more noticeable and easier to...

objects are present in given part of the sky, there always is some low luminosity present, due mostly to light diffusion from the atmosphere (diffusion...

and luminosity to the secondary member. As a result, the components in a contact binary often have similar effective temperatures and luminosities, regardless...