![]() ![]() In a red shift, the spectral lines appear at lower frequencies. This effect is markedly different from a red shift, however. If a gas or dust cloud lies between an astronomical object and the observer, the light is "reddened" somewhat. It appears that the only people who take it seriously are those who reject conventional cosmological models.Īlternate explanations Interstellar reddening It can safely be said that evidence for the existence of a quantized redshift is hardly convincing. Another survey provided weak evidence, but a subsequent re-analysis of the same data brought that conclusion into question, explaining the observations as an effect of the statistical techniques used to derive it. Recent studies indicate no evidence or weak evidence. Starting in the late 1990s, and continuing to the present day, the redshifts of a much larger numbers of galaxies were measured, providing significantly more data. Starting in 1973 and up to the late 1990s, some studies indicated the possibility for a periodicity in galaxy clusters depending on the statistical methods used for data analysis. Creationists have taken the data to indicate that our galaxy is at the "centre" of the universe. However, it is used by creationists and geocentrists to argue that Earth is at the center of the Universe. Evidence for it is flimsy at best, and consequently it is largely ignored by most experts. Quantized redshift refers to the clustering of galaxies in concentric shells away from Earth at periodic distances. It was the conclusion that distance was proportional to red shift (the further away an object, the greater its speed of departure) that caused Edwin Hubble to propose that the Universe is expanding. The red shift is basically proportional to the distance an object is away from us, due to the continuous expansion of the universe.Īstronomy uses the frequency shift of various known marker lines in stellar emissions to determine the relative rate of approach (rare but existent) or departure of objects at any distance from the observer. Since we know the characteristic frequencies of various radiation-producing phenomena, we can compare the spectrum we observe and see how far it is "red shifted" (in the case of objects moving away from us) or "blue shifted" (for those approaching). In astronomy, this effect is combined with theories about the structure of the Universe to determine the distance to sources of light and other electromagnetic radiation. Radar and laser speed guns generally use shift measurement of reflected radiation to ascertain speeds of moving objects. In the case of vehicles with sirens, this change to a decreasing pitch is often accompanied by a sigh of relief - the "Doppler Sigh". The pitch is higher as it approaches and lower as it leaves. We notice this in ordinary life when listening to a rapidly moving vehicle approach and then depart from our listening position (especially if it has a siren!).
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