Solar luminosity

luminosity of the SunSun's luminosityluminositysolar luminositiesof the SunSunas the Sunluminous as the Sunthat of the Sunthe Sun
The solar luminosity, is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.wikipedia
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Luminosity

luminousbolometric luminosityluminosities
The solar luminosity, is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.
Values for luminosity are often given in the terms of the luminosity of the Sun, L ⊙ . Luminosity can also be given in terms of the astronomical magnitude system: the absolute bolometric magnitude (M bol ) of an object is a logarithmic measure of its total energy emission rate, while absolute magnitude is a logarithmic measure of the luminosity within some specific wavelength range or filter band.

Solar cycle

solar activitysunspot cyclesolar variation
The Sun is a weakly variable star, and its actual luminosity therefore fluctuates.
Satellite monitoring of solar luminosity revealed a direct relationship between the Schwabe cycle and luminosity with a peak-to-peak amplitude of about 0.1%.

Solar mass

mass of the SunSun's masssolar masses
Solar mass
Most of this energy eventually radiates away from the Sun.

Triple-alpha process

helium fusionhelium burningtriple alpha process
Triple-alpha process
During the core flash, the star's energy production can reach approximately 10 11 solar luminosities which is comparable to the luminosity of a whole galaxy, although no effects will be immediately observed at the surface, as it is hidden by the star's overlying layers.

Solar radius

radius of the SunSun's radiussolar radii
Solar radius
Solar luminosity

Radiant flux

sunlightradiant powersolar flux
The solar luminosity, is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.

Power (physics)

powermechanical powerpower output
The solar luminosity, is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.

Photon

photonslight quantalight
The solar luminosity, is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.

Astronomer

astronomersastrophysicistprofessional astronomers
The solar luminosity, is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.

Star, Russia

starstellarstars
The solar luminosity, is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.

Galaxy

galaxiesgalacticgalactic nuclei
The solar luminosity, is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.

Sun

solarSolThe Sun
The solar luminosity, is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.

International Astronomical Union

IAUInternational Astronomical Union (IAU)I.A.U.
One nominal solar luminosity is defined by the International Astronomical Union to be 3.828 W. This does not include the solar neutrino luminosity, which would add.

Solar neutrino

solar neutrinossolarneutrino emissions from the Sun
One nominal solar luminosity is defined by the International Astronomical Union to be 3.828 W. This does not include the solar neutrino luminosity, which would add.

Variable star

variablevariable starsvariability
The Sun is a weakly variable star, and its actual luminosity therefore fluctuates.

Irradiance

intensitylight intensityspectral irradiance
Solar luminosity is related to solar irradiance (the solar constant).

Solar constant

energy from the starheatintensity at Earth orbit
Solar luminosity is related to solar irradiance (the solar constant).

Orbital forcing

astronomical cyclesdriven byorbital changes
Solar irradiance is responsible for the orbital forcing that causes the Milankovitch cycles, which determine Earthly glacial cycles.

Milankovitch cycles

Milankovitch theoryMilankovitchMilankovitch cycle
Solar irradiance is responsible for the orbital forcing that causes the Milankovitch cycles, which determine Earthly glacial cycles.

Astronomical unit

AUastronomical unitsAUs
where A is the unit distance (the value of the astronomical unit in metres) and k is a constant (whose value is very close to one) that reflects the fact that the mean distance from the Earth to the Sun is not exactly one astronomical unit.

Metre

metermmetres
where A is the unit distance (the value of the astronomical unit in metres) and k is a constant (whose value is very close to one) that reflects the fact that the mean distance from the Earth to the Sun is not exactly one astronomical unit.

Nuclear fusion

fusionhydrogen fusionfusion reaction
Nuclear fusion

Future of Earth

end of life on Earthfuture of the Earthred giant star
These include the chemistry at Earth's surface, the rate of cooling of the planet's interior, the gravitational interactions with other objects in the Solar System, and a steady increase in the Sun's luminosity.

Megamaser

megamasers
Megamasers have typical luminosities of 10 3 solar luminosities, which is 100 million times brighter than masers in the Milky Way, hence the prefix mega.

Capella

AlhaiotAlpha Aurigaealpha Aurigae (Capella)
Capella Aa is the cooler and more luminous of the two with spectral class K0III; it is 78.7 ± 4.2 times the Sun's luminosity and 11.98 ± 0.57 times its radius.