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Why is the suns luminosity 1?
A solar luminosity is equal to the current luminosity of the Sun, which is 3.839 × 1026 W, or 3.839 × 1033 erg/s.So dividing one solar luminosity with the Suns luminosity gives 1.Also it is a lot easier talking about a luminosity of 1 rather than 3.838 x 1026 W, the same way astronomers use 1 AU to mean 150,000,000km.
Why do cool stars have greater luminosity than our sun?
They do not necessarily have greater luminosity, it depends on their size. Betelgeuse is cooler and brighter; a red dwarf is cooler and less bright.
What luminosity measure that different from what absolute visual magnitude measures?
1.Luminosity is the amount of light emitted from a certain light source whereas brightness is the amount of light manifested or received. 2.The area of illumination is inversely proportional to brightness whereas luminosity isn't. 3.Brightness is usually expressed in 'Lumens' whereas luminosity is expressed in candela per square meter (photometry).
Do blue green algae need the sun?
No. Only animals need sun. Animals have a process called hydrosynthesis, which is using the sun's luminosity to digest water.
What type of star is Zeta Herculis?
Zeta Herculis is a binary star system in the constellation Hercules.It has a class of G0V which means it is similar to our Sun but is moving away from the main sequence.It's companion star is a class K0V
How is star luminosity measured?
A star's luminosity is measured according to the relevance to the sun. Basically for example, if a star is 8,300 degrees Celsius and has a luminosity of 0.001; the luminosity is compared to the sun.
What is the luminosity of the sun?
The absolute luminosity is about 3.839×1026 W, or 3.839×1033 erg/second. The comparative luminosity of an astronomical object is based on the Sun, so it has a relative luminosity of 1.
What is the luminosity class of the sun?
V
What is the luminosity of Betelgeuse?
Betelgeuse has about 140,000 times the luminosity of our sun or about 5.37×1031 watts.
According to the Hertzsprung Russell Diagram what is the luminosity of the Sun?
The Sun is the main basis for many stellar parameters. A far as luminosity goes - it is 1.
What is a Polaris star luminosity?
The main star in the Polaris system has a luminosity which is 2500 times that of the Sun.
What is the luminosity of the sun in watts?
the luminosity of the sun mesured in watts is a big number so heres something a little simpler 3.839 × 1026 W
What is the luminosity of Deneb?
Deneb has a luminosity (apparent magnitude) of 1.25. However, in bolometric luminosity (solar units) Deneb is 54,000, whereas our Sun is 1.
What is 3.8261026?
3.826x1026 is the luminosity, in Joules/second, of our sun.
What region of the sun is solar luminosity is produced?
photosphere
Does Rigel have a higher luminosity and a lower temperature the the sun?
No.
Why is alpha centauri as luminosity 1.6 times that of the sun?
Alpha Centauri is as luminosity is 1.6 times that of the sun because it fuses hydrogen and helium in its core at a higher rate.
