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What is the significance of quantized redshifts in the study of cosmology and the expansion of the universe?
Oh honey, let me break it down for you. Quantized redshifts basically tell us the amount by which light from galaxies has been stretched as the universe expands. It's like a cosmic measuring tape showing us how the universe has grown. Scientists use this info to track the expansion of the universe and figure out its age and fate.
What else can I help you with?
What does redshifts indicate to astronomers?
The object is moving away from the observer.
What are the strengths and weaknesses of the redshift theory?
cons quasars have have large red shift that suggest they are far away as distant galexies some quazars with very high redshifts appear to be interacting with other galexies that have lesser redshift which would suggest that quazars have ann in trensic redshift pros its perfect evidence to show that the universe is expanding
How can scientists estimate when the big bang happened?
Scientists estimate the age of the universe and the Big Bang by studying the cosmic microwave background radiation, known as the afterglow of the Big Bang. By analyzing the temperature fluctuations in this radiation, researchers can determine the age of the universe to be approximately 13.8 billion years old.
What is a red shift and what does it tell us?
A 'red shift' is the increase in the wavelength of light received from astronomicalobjects, compared to what we know the wavelength should be. It's called "redshift" because if the wavelength of some visible light is increased, the color of thelight changes in the direction of the color with the longest visible wavelength, whichis red. If the shift is really substantial, light that left a star at visible wavelengthsmay even red-shift completely out of the visible range, and arrive here as infraredradiation.The only mechanism we know of that can increase the wavelength of light ...without the light passing into a different medium ... is the receding (moving away)of the light source from us, and it's generally agreed that if the light we receive froman astronomical object is red-shifted, then the object is moving away from us. Thefaster the object is moving away from us, the greater the increase in the wavelengthof its light.This is a big deal in Astronomy and Cosmology. If it's true, then there have beenenough observations of red shift over the past hundred years to reveal the generalpattern that ALL of the distant objects in the universe are moving away from us, andthe farther from us they already are, the faster they're moving away. This is the basisof the statement you've heard that "the Universe is expanding".Notes:1) If thelight source ismoving toward us, then its light arrives here blue-shifted ... withshorter wavelengths than we know it had when it left the source. There's not much ofthat to be seen, and it's all coming from objects that are relatively close to us.2) Strictly speaking, the expanding Universe causes the "Cosmological Redshift"which is similar to, but different from, the "Doppler Effect".3) There is, in fact, another mechanism for producing a redshift. Strong gravitational fields can have this effect. Some astronomers used to arguethis was a possible explanation for the redshifts of some galaxies.However the consensus now is that it's the expansion of space that's by far the most likely cause of the redshifts of galaxies.
What is the angular diameter distance formula used to calculate the distance between two objects in astronomy?
The angular diameter distance formula in astronomy is used to calculate the distance between two objects based on their apparent sizes in the sky. It is given by D_A = θ / δθ, where D_A is the angular diameter distance, θ is the actual size of the object, and δθ is its angular size as seen from Earth.
Do quasars have large or small redshifts?
Quasars typically have large redshifts, which indicate that they are moving away from us at high speeds. This redshift is due to the expansion of the universe and can help astronomers determine the distance and age of quasars.
Will astronomers do all the redshifts of the 100 billion galaxies in the universe?
Perhaps in the future astronomers will do all the redshifts of the 100 billion galaxies in the universe.
Do quasars have a redshift?
Yes, very large redshifts.
Can astronomers get all 100 billion redshifts for all 100 billion galaxies in the observable universe?
No, because it will be impossible for astronomers to get all 100 billion redshifts for all 100 billion galaxies in the observable universe.
How can you list all the designations and redshifts of all 100 billion galaxies in the observable universe?
It is not possible to list all designations and redshifts of all 100 billion galaxies (cseligman.com/text/atlas/pgc00.htm)
The spectra of most galaxies show redshifts this means that their spectral lines are what?
The spectral lines of galaxies are redshifted, indicating that they are moving away from Earth. This redshift is typically a result of the expansion of the universe, causing galaxies to move further apart.
How does the expansion of the universe create redshifts?
As the universe expands, the space between galaxies also expands, causing their light to stretch out as it travels through this expanding space. This stretching of light waves results in redshift, where the wavelength of light increases, shifting it towards the red end of the spectrum.
What two quantities did Edwin Hubble compare to discover the expansion of the Universe?
Edwin Hubble compared the distances to galaxies (based on their brightness) and their redshifts (due to the Doppler effect) to discover the expansion of the Universe. By finding a relationship between these two quantities (dubbed Hubble's Law), he provided evidence that the Universe is expanding.
Will astronomers measure redshifts of 100 billion galaxies in the observable universe?
No. We do not have time to make so many measurements.
Is it impossible to do all the redshifts of the 100 billion galaxies in the observable universe?
Yes. To image, catalog, and calculate the redshift of each galaxy individually would take an extremely long time. In order to complete the work in 100 years we would need to measure redshifts at a rate of more than 30 galaxies per second.
The spectra of most galaxies show redshifts this means that their spectral lines?
have wavelengths that are longer than normal:)
Who showed that other galaxies existed nd observed that the universe is expanding?
Edwin Hubble showed that galaxies exist and he correlated galaxies to redshifts.However, Hubble did not conclude that the redshift indicates the universe is expanding. Unfortunately, lesser Physicists have rushed to the conclusion that the Universe is expanding. Much of tthis is because Einstein's Relativity Equations only had solutions for expansion or contraction. of the two, Lemaitre called for expansion in his Big Bang, and this is the situation today.Here is Hubble's position from an article:http://apod.nasa.gov/diamond_jubilee/1996/sandage_hubble.htmlHubble concluded that his observed log N(m) distribution showed a large departure from Euclidean geometry, provided that the effect of redshifts on the apparent magnitudes was calculated as if the redshifts were due to a real expansion. A different correction is required if no motion exists, the redshifts then being due to an unknown cause. Hubble believed that his count data gave a more reasonable result concerning spatial curvature if the redshift correction was made assuming no recession. To the very end of his writings he maintained this position, favouring (or at the very least keeping open) the model where no true expansionexists, and therefore that the redshift "represents a hitherto unrecognized principle of nature". This viewpoint is emphasized (a) in The Realm of the Nebulae, (b) in his reply (Hubble 1937a) to the criticisms of the 1936 papers by Eddington and by McVittie, and (c) in his 1937 Rhodes Lectures published as The Observational Approach to Cosmology (Hubble 1937b). It also persists in his last published scientific paper which is an account of his Darwin Lecture (Hubble 1953).The redshift is still an unrecognized principle of nature, The redshift is an indicator of Continuity, the balance between the centrifugal forces and the centripetal forces. Gravity potential energy gives the centripetal force and the vector energy gives the centrifugal force. Now some physicists deny the existence of centrifugal force. The fact is there is a centrifugal fforce and it is produced by the so-called "Dark Energy", which those same physicists affirm.Hubble is correct, the Universe is not expanding and the redshift is no longer an unrecognized principle in nature, it is the "Fine Structure 'Constant' of matter, v/c is the redshift = square-root(GM/rc2).
