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...

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...

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...

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

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

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...

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...

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

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...

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

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

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...

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

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

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...

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

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

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

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

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...

radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature. They lie above the main sequence (luminosity class V in the...

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

giving a relatively modest luminosity of 90,000 L☉. 2 years later, a new calculation for finding the bolometric luminosity by fitting the Spectral Energy...

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 the...

In astronomy, the Tully–Fisher relation (TFR) is a widely verified empirical relationship between the mass or intrinsic luminosity of a spiral galaxy...

magni- tude (MV) A hypergiant (luminosity class 0 or Ia+) is a very rare type of star that has an extremely high luminosity, mass, size and mass loss because...

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...