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The redshift indicates that the star is centrally attracted and its centrifugal acceleration is away from the central attraction. The redshift indicates the balance between centripetal and centrifugal forces.
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The cause of red-shift is not known with certainty, since there's no laboratory big
enough to simulate most of the possible causes.
But one factor that we know can shift the whole spectrum of a star toward longer
wavelengths is motion away from us at high speed. The conventional wisdom in
Astrophysics and Cosmology today assumes that to be the cause of observed
redshift, and the whole theory of the expanding universe rests on observations
made in conjunction with that assumption.
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Does the velocity of a star toward or away from earth determine measuring the shift of its spectral lines?
Yes. If the star is moving away from the Earth, its spectral lines will shift towards the red end of the spectrum. If it is moving towards the Earth, its spectral lines will shift towards the violet end of the spectrum. This is due to Doppler effect.
The set of spectral lines that we see in star's spectrum depends on the stars?
Chemical composition ;-)
What acts as fingerprints to help scientists determine a star's composition?
Spectral lines - nn
How would the spectral lines of a star change when moving closer towards earth?
It would change by shifting to the wavelength blue.
What are two properties that are used to characterize a star?
The colors and lines in the spectrum of a star indicate the elements that make up the star.
If a star moves away from earth when all lines shift to where the waves are longer is what?
That is called "redshift".That is called "redshift".That is called "redshift".That is called "redshift".
Why would the star Sirius find that its spectral lines are blue shifted?
The spectral lines of Sirius are blueshifted because the star is moving more or less toward us.
The spectrum of a star is called a what?
... a photonic 'fingerprint'. The picture of a star's spectral lines is its photo-spectrograph.
Does the velocity of a star toward or away from earth determine measuring the shift of its spectral lines?
Yes. If the star is moving away from the Earth, its spectral lines will shift towards the red end of the spectrum. If it is moving towards the Earth, its spectral lines will shift towards the violet end of the spectrum. This is due to Doppler effect.
The set of spectral lines that we see in star's spectrum depends on the stars?
Chemical composition ;-)
What acts as fingerprints to help scientists determine a star's composition?
Spectral lines - nn
The more spectral lines of a star are shifted to the red end of the spectrum the?
... faster it moves away from us.
What are dark lines in a stellar spectrum called?
The dark lines are absorption spectrum, the energy absorbed by Atoms in the atmosphere of the star. ================================ Fraunhofer's spectral lines.
Can the Doppler effect reveal the rotation speed of a star by the splitting of the spectral lines?
Yes that is true! Astronomy homework?
How would the spectral lines of a star change when moving closer towards earth?
It would change by shifting to the wavelength blue.
What are two properties that are used to characterize a star?
The colors and lines in the spectrum of a star indicate the elements that make up the star.
Is a Lyman-break galaxy a star-forming galaxy at a high redshift?
Yes, a Lyman-break galaxy is a star forming galaxy at a high redshift.
