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The reference that astronomers use to compare the luminosity of other stars is the sun's luminosity. The luminosity is denoted in multiples of the sun's luminosity. For example, the luminosity of the star Sirius is 25 times the luminosity of the sun.
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∙ 9y ago
Wiki User
∙ 7y agoAstronomers define star brightness in terms of apparent magnitude (how bright the star appears from Earth) and absolute magnitude (how bright the star appears at a standard distance of 32.6 light years, or 10 parsecs). Astronomers also measure luminosity - the amount of energy (light) that a star emits from its surface.
Wiki User
∙ 6y agoIt means how much power (energy per unit time) the star emits in total.
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∙ 13y agoPaynis
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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 does a stars luminosity measure?
Luminosity is the total amount of energy emitted by a star per second.
What characteristic of stars is measured by luminosity?
apparent brightness and distance are the most straightforward measurements. However using the Hertzprung-Russel (HR) Diagram you can determine the stellar class (and with it the luminosity) of a star by observing it's color, and the characteristics of the spectral lines in the stars light. This allows a quick, if indirect, and accurate method to determining stellar luminosities.
What do variable stars help astronomers measure?
Distance.
How do astronomers measure the distance to nearby stars?
Astronomers use a method called parallax to measure the distance to nearby stars. Astronomers can measure parallax by measuring the position of a nearby star with respect to the distant stars behind it. Then, they measure the same stars again six months later when the Earth is on the opposite side of its orbit.
How astronomers measure stellar temperatures?
Stellar temperature can be measured by analysing the spectrum of light that stars emit; shorter wavelengths correspond to higher temperatures.
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 are two methods that astronomers use to obtain stellar radii?
not enough info
How do astronomers measure it?
How do they measure what?
What does a stars luminosity measure?
Luminosity is the total amount of energy emitted by a star per second.
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.
What measures star distance from the Earth?
Stellar Parallax Astronomers estimate the distance of nearby objects in space by using a method called stellar parallax, or trigonometric parallax. Simply put, they measure a star's apparent movement against the background of more distant stars as Earth revolves around the sun.
What characteristic of stars is measured by luminosity?
apparent brightness and distance are the most straightforward measurements. However using the Hertzprung-Russel (HR) Diagram you can determine the stellar class (and with it the luminosity) of a star by observing it's color, and the characteristics of the spectral lines in the stars light. This allows a quick, if indirect, and accurate method to determining stellar luminosities.
What has the author J G Ireland written?
J. G. Ireland has written: 'The effect of rotation on stellar luminosity' -- subject(s): Stars
What is used when astronomers measure the distance from the sun to the earth?
Parallax is the method that astronomers use to measure the distance from the sun to the earth.
How do you measure the distance to a cepheid?
Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.Cepheids have a certain relationship between their period, and their absolute luminosity. Thus, their absolute luminosity can be determined. Comparing this with their apparent luminosity allows us to calculate their distance.
Will astronomers measure all the distances of the 100 billion galaxies in the universe?
It is possible that someday astronomers will measure all the distances of the 100 billion galaxies in the universe.
