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Not at all. "Blue shift" refers to a shift of features in the star's spectrum toward shorter
wavelengths, for stars that are moving toward us. It has nothing at all to do with the
composition or properties of the star itself.
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If we observe a Doppler blue shift from a star the star must be a?
In that case, the star must be approaching us.
What is a Doppler red shift and a Doppler blue shift?
A Doppler red-shift is a shift in recognizable features of a star's spectrum from the wavelengths where we know they belong toward longer wavelengths. Such a shift can be caused by the star's moving away from us, and that's how it's interpreted when astronomers see it. A Doppler blue-shift is a shift in recognizable features of a star's spectrum from the wavelengths where we know they belong toward shorter wavelengths. Such a shift can be caused by the star's moving toward us, and that's how it's interpreted when astronomers see it.
Why is a blue star hotter than a red star?
If a blue star wasn't so hot - it wouldn't be a blue star - it would be a white star.See related question for more details.
What property of the light of a far away galaxy has changed to allow it to have a blue shift?
it Will not be a star
What phenomenon accounts for the blue shift of a star moving towards Earth?
The Doppler effect
Is an O star blue or red?
A star with a spectral class of O is classified as a Blue Star. A red star will have a spectral class of M See related question
Will the star's lifecycle be shorter or longer if its mass is greater?
Shorter
Where does a supernova fit into a star's lifecycle?
A supernova occurs at the end of a massive star's life cycle.
Is a blue star blue?
It will appear blue because of it's immense temperature. Blue stars are very hot.See related question.
What the difference between red shift and blue shift?
The frequency of light from a star is reduced (its wavelength increased) when the star is moving away from the observer. Red light has longer wavelengths than blue light. So the light from a star which is moving away from the earth appears to be redder than it actually was. This phenomenon is similar to the pitch of an ambulance siren dropping as it passes you and is moving away. The true spectrum for light from a star depends on the temperature of the star, but there are characteristic absorption lines (dark lines) in the spectrum which are specific to chemical elements which are present in the outer regions of the stars - such as hydrogen and helium. Light from within the star is absorbed by the atoms of these elements when they move from a low-energy state to one with a higher energy level. A comparison of where in the spectrum these lines appear to be against where they should be (for a stationary) star are a measure of the red-shift (or blue shift).A red shift is observed if an object is moving away from the earth while a blue shift is observed if it is approaching the earth.
What are the difference between red shift and blue shift?
The frequency of light from a star is reduced (its wavelength increased) when the star is moving away from the observer. Red light has longer wavelengths than blue light. So the light from a star which is moving away from the earth appears to be redder than it actually was. This phenomenon is similar to the pitch of an ambulance siren dropping as it passes you and is moving away. The true spectrum for light from a star depends on the temperature of the star, but there are characteristic absorption lines (dark lines) in the spectrum which are specific to chemical elements which are present in the outer regions of the stars - such as hydrogen and helium. Light from within the star is absorbed by the atoms of these elements when they move from a low-energy state to one with a higher energy level. A comparison of where in the spectrum these lines appear to be against where they should be (for a stationary) star are a measure of the red-shift (or blue shift).A red shift is observed if an object is moving away from the earth while a blue shift is observed if it is approaching the earth.
Why would the classification of a star change as it age?
It can be classified early in its lifecycle and classified as a different type of star as it ages.
