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What would an astonomer conclude if he or she observed that the spectrum of a star had shifted to the blue end?
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What happen to the spectrum of a star moving toward the earth away from the earth?
If a star is moving towards Earth. The light is seen as 'blue shifted'. As we look at our sun, on the colour spectrum, black lines appear. When looking at distant stars, we can tell if they are moving away from us (Red shift) or getting closer to us (Blue shift). This is because the black lines shift to the red or blue end of the spectrum depending on which direction the star is travelling.
If a galaxy is moving towards the earth what direction does its spectrum move?
It will be blue shifted
The more spectral lines of a star are shifted to the red end of the spectrum the?
... faster it moves away from us.
The spectra of most galaxies show redshifts this means that their spectral lines are what?
shifted towards the red end of the spectrum
How do astronomers determine the speed at which a galaxy is moving?
By examining its spectrum, and identifying absorption lines in it. Lines are shifted toward shorter wavelength if the object is moving towards us. They're shifted toward longer wavelength if the object is moving away from us.
What did Hubble conclude when he noted that light emitted from stars is shifting toward the red of the electromagnetic spectrum?
He noted that light emitted from stars is shifted further toward the red of the electromagnetic spectrum . From this he concluded that the universe was expanding.
What happen to the spectrum of a star moving toward the earth away from the earth?
If a star is moving towards Earth. The light is seen as 'blue shifted'. As we look at our sun, on the colour spectrum, black lines appear. When looking at distant stars, we can tell if they are moving away from us (Red shift) or getting closer to us (Blue shift). This is because the black lines shift to the red or blue end of the spectrum depending on which direction the star is travelling.
If a galaxy is moving towards the earth what direction does its spectrum move?
It will be blue shifted
The more spectral lines of a star are shifted to the red end of the spectrum the?
... faster it moves away from us.
The spectra of most galaxies show redshifts this means that their spectral lines are what?
shifted towards the red end of the spectrum
How do people know when a star is moving toward or away from the earth?
blue shifted
Which of the following might be evidence for an extrasolar planet?
Doppler-shifted stellar spectrum and physics calculations that indicate a low-mass object
How do you demonstrate the red shift and Doppler effect?
Examine the light of hydrogen emissions from a distant galaxy. Compare that spectrum with that of hydrogen in a laboratory. You'll find that spectrum is identical EXCEPT that it is shifted towards longer wavelengths.
How do astronomers determine the speed at which a galaxy is moving?
By examining its spectrum, and identifying absorption lines in it. Lines are shifted toward shorter wavelength if the object is moving towards us. They're shifted toward longer wavelength if the object is moving away from us.
If light experiences the Doppler effect what will happen to its color?
If light is subject to the Doppler effect, it will change color. The light changes color toward the lower (red) end of the spectrum or the upper (blue) end of the spectrum. Which way the color shifts depends on whether the distance between the source and the observer is increasing or decreasing. Should we find the distance is increasing, the light will be shifted toward the red end of the spectrum. This is called redshift (one word), and astronomers know this well because most all galaxies are speeding away from the Milky Way and have their light shifted toward the red end of the spectrum. If the distance between a source and observer is decreasing, the color of the light will be shifted toward the blue end of the spectrum. In either case, the amount the color is shifted will be determined by the rate the distance between the source and observer is changing. If a galaxy is moving away from the Milky Way, we'll see a shift toward red, and if another galaxy is moving away faster, will see a greater shift in the color of the light from it.
What is it called when galaxies are moving toward each other?
There isn't a particular name, however, when they are moving towards us, their spectrum is shifted to the blue region. So they are referred to as blue shifted galaxies but that is only relative to ourselves. See related link for more information.
Why is the west limb of the sun red-shifted and the east limb blue-shifted?
Because the sun is rotating. So its west limb is moving away from us and its east limb is moving toward us ... the exact conditions required in order to shift the emission spectrum.
