red shift
2
7.2
- noun
- /rɛd ʃɪft/
- Specialized
:
corrimiento al rojo
- As the universe expands, light from far-off galaxies shows an increasing red shift that scientists use to measure cosmic distances.
So what we did was to take a catalog of galaxies which had the red shifts measured.
- So what we did was to take a catalog of galaxies which had the red shifts measured.
- OK, so we have to make do with these six colours and we have still got to measure the red shifts of those galaxies with the six colours.
- Well, you can tell by when, when things move away, light, light, there's something called a a Doppler shift, there's a red shift.
- This is the red shift, but it should also just take longer for these explosions to fade away the further away they are.
- What he did was he measured the relation between velocities as determined from red shifts come back to red shifts in a little while.
Examples
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On the other hand, radial velocities of such objects can be easily obtained as a result of measurements of their red shifts.
Blog text (3) -
Still, the final nail in the coffin for the idea was Edwin Hubble's discovery of the relationship between red shift -- the way the color of heavenly bodies changes as they move away from us -- and distance, which showed that the universe was indeed expanding.
Blog text (10) -
For example, why do distant moving away objects in space display the red shift?
Blog text (29) -
And since the universe is expanding, there is a direct relation between the amount of red shift and the distance.
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How will each one of the above affect the red shift as observed from each galaxy?
Blog text (2) -
If the red shift were increased, would it appear that the galaxies are moving away from each other faster than they really are?
Blog text (2) -
Thanks for explaining the method used to discover this planet: using periodic fluctuations in the red shift of a star.
Blog text (13) -
And crucially, they've been shown to have a red shift or a Doppler shift that meant that they were moving away from us.
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Quantization, along with the other red-shift-correlated properties of galaxies, provides the only direct evidence for the theory so far.
Academic text (1995) -
To truly analyze and understand the situation, however, we need to know the radial velocities (i.e., red-shifts) of not only the polar ring galaxies themselves, but also of all galaxies in their vicinity.
Academic text (1993)
Synonyms
4
8.6
Light from distant galaxies that looks more red because they are moving away
Surface Forms
Morphology
The noun is compositionally built: 'red' (the color or longer wavelengths) + 'shift' (a change or movement) yields ‘a change toward red’, so a learner who knows both words can infer it refers to light moving to redder wavelengths. The astronomical implications (Doppler effect, cosmic expansion) are technical, but the core semantic combination is transparent and cross-linguistically expressed in similar terms.
Etymology
The term red shift comes from a simple image: when a star or galaxy moves away, its light waves stretch and look a little more red, so the light has shifted toward red. So, seeing a red shift tells scientists that the object is 'moving away' from us and helps show the universe is 'expanding'.