It was the light doppler effect that led ultimately to the Big Bang Theory that is the theory about the beginning of the universe. When Edwin Hubble noticed that the galaxies were moving away from us, the big bang theory started to take off. If they were moving away, they should have all been close, very close, as close as a an atomic singularity. Next Article : Batman vs. There's no register feature and no need to give an email address if you don't need to.
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The faster the object is moving, the more the frequency is shifted. Most galaxies are moving away from us and their light is red-shifted. In general, the further away, the greater the red shift. Recently astronomers have detected more than planets revolving about other stars using the Doppler Effect. The gravitational force of the planet on the star causes the planet and star each to circle around a common point, usually close to, but not in the center of, the star.
The effect is truly tiny. Notice how the pattern of absorption lines shifts to the red as the galaxies get fainter. The numbers above and below the spectra are the measured wavelengths in nm [ nanometers ]. When z is larger than 1 then cz is faster than the speed of light and, while recession velocities faster than light are allowed, this approximation using cz as the recession velocity of an object is no longer valid.
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