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What happens when light from distant galaxies is shifted towards longer wavelength?
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What is the relationship between red-shift and distant galaxies?
Redshift is the phenomenon where light from distant galaxies appears to be shifted towards longer (redder) wavelengths. This is due to the expansion of the universe causing the galaxies to move away from us. The amount of redshift is directly related to the distance of the galaxy from us, with more distant galaxies experiencing higher redshift.
Who discovered blue shift?
The blue shift phenomenon was discovered by the American astronomer Edwin Hubble in the 1920s. He observed that the light from distant galaxies appeared shifted towards the blue end of the spectrum, indicating that these galaxies were moving away from us. This discovery provided crucial evidence for the expansion of the universe.
Relationship of red shift and the big bang theory?
Redshift is a phenomenon where light from distant galaxies appears shifted towards the red end of the spectrum, indicating they are moving away from us. The Big Bang theory suggests that the universe began from a singularity and has been expanding ever since. The observed redshift of distant galaxies supports the idea of an expanding universe, as galaxies moving away would cause their light to shift towards the red end of the spectrum.
How do red and blue shift show movement of objects in space?
If the distance between us and a object emitting a wave (sound or light) is increasing, then the wavelength of the wave it emits will be red-shifted. If the distance is decreasing, it will be blue-shifted. This is true for a car driving towards us with its horn blaring, or a distant galaxy emitting hydrogen lines.
Do we observe the red shift or the blue shift in most of the universe and what does this suggest about the universe?
Most of the more distant galaxies appear to be red-shifted, indicating that they may be moving away from us. (Some, like the Andromeda galaxy, are blue-shifted, indicating that they are moving toward us. In fact, the Andromeda galaxy will probably collide with the Milky Way in about 4 billion years or so. ) Because distant galaxies in every direction are red-shifted, many scientists speculate that the universe itself is expanding, and carrying those distant galaxies away. The further away they are, the faster they seem to be moving, which reinforces the "universal expansion" concept. Given that the entire field of astrophysics is less than 150 years old, I suspect that there may be more going on than we currently believe, and that our descendants six generations hence will wonder "What were they thinking?" So keep your minds open, and don't think that there isn't anything new to be learned.
The fact that the light from distant galaxies is red-shifted suggests that the galaxies are?
Moving away from us
The spectral lines from distant galaxies do not match spectral lines on Earth due to?
The spectral lines from distant galaxies do not match those on Earth because of the Doppler effect, cosmic expansion, and differences in elements present in the galaxies. These factors cause the observed spectral lines to be shifted or altered compared to what we see on Earth.
What is the relationship between red-shift and distant galaxies?
Redshift is the phenomenon where light from distant galaxies appears to be shifted towards longer (redder) wavelengths. This is due to the expansion of the universe causing the galaxies to move away from us. The amount of redshift is directly related to the distance of the galaxy from us, with more distant galaxies experiencing higher redshift.
How does redshift support the notion of the expanding universe?
The redshift of distant galaxies is believed to be a result of the Doppler effect - in other words, the light is shifted towards lower frequencies ("redshifted") due to the fact that the galaxies move away from us.
Who first propsed that the universe is expanding?
The astronomer Edwin Hubble was the first to find evidence of the expansion of the Universe, through his observations of distant galaxies. He observed that light emitted from most of the distant galaxies was more red in color. This is known as the Doppler effect or Doppler shift, where objects that emit a certain wavelength and move away from the observer appear to have a longer wavelength than the true wavelengths to the observer. It's the opposite case when objects emitting waves that are coming closer to the observer. These observations lead Hubble to believe that these surrounding red-shifted galaxies are moving away from us. Since most of the galaxies were moving away from us, and since Hubble found that with increasing distance between the galaxies there is an increasing speed at which they are moving apart, he concluded that the Universe was and still is expanding.
The Doppler effect applies to light waves as well as sound waves. Astronomers use this to measure the motion of stars and galaxies. In 1929 Edwin Hubble discovered that light from distant galaxies was?
shifted to longer wavelengths, indicating that the galaxies were moving away from us. This observation led to the development of the theory of the expanding universe.
What color are distant galaxy's?
They are red shifted.
What galaxies have a blue shift?
There are about a 100 known blue shifted galaxies. The most well known, is the Andromeda Galaxy.
Who discovered blue shift?
The blue shift phenomenon was discovered by the American astronomer Edwin Hubble in the 1920s. He observed that the light from distant galaxies appeared shifted towards the blue end of the spectrum, indicating that these galaxies were moving away from us. This discovery provided crucial evidence for the expansion of the universe.
Relationship of red shift and the big bang theory?
Redshift is a phenomenon where light from distant galaxies appears shifted towards the red end of the spectrum, indicating they are moving away from us. The Big Bang theory suggests that the universe began from a singularity and has been expanding ever since. The observed redshift of distant galaxies supports the idea of an expanding universe, as galaxies moving away would cause their light to shift towards the red end of the spectrum.
Does the medium of space make distance stars appear to be more red shifted only because they are farther away?
Distant stars appear red shifted because they are travelling away from Earth. It just happens that more distant stars are moving faster, so there is a greater red-shift the further a star is from the Earth.
What is the red shift and how is it important to your understanding of the universe?
Red shift is the irrefutable fact that the light from all distant galaxies (ie, those outside our Local Cluster) has a longer wavelength (ie, is shifted to the red spectrum) than it would if the galaxy were close to us. It is also irrefutable that the amount of red-shift is dependent on the distance between us and the galaxy. In conjunction with other irrefutable facts, the only explanation is that the distances between all galaxies -- indeed, all lengths -- are growing greater with time.
