![]() It was Edwin Hubble who first discovered and described the redshift phenomena. Blueshift and Redshift doesn't just apply to stars but also galaxies and nebulas, anything that gives light. Redshift shift of light to a longer wavelength as it moves away Blueshift A Doppler shift in which spectral features are shifted to shorter wavelengths, observed when an object is moving toward the observer. If a star moves relative to an observer, the light that is emitted by that star is either compressed, or stretched. Looking at a star's spectrograph can also tell what its made of and the metals that are in the star and therefore estimate its age amongst other things. Scientists use spectrographs to look at the colour spectrum of the light from the star to determine the characteristics. In the case of the Andromeda Galaxy, it has been discovered that it moving closer to us, at about 75 miles per second which may seem fast but due to the sheer distance between our galaxy and the Andromeda Galaxy means they won't collide for another four billion years so we are safe The further away, the more red the lights spectrum has. By looking at the spectrum of the objects light, it is also possible to determine how far away the object is by the stretched nature of the spectrum. By looking at the blue and red shift, we can determine whether the object is coming closer to us such as in the case of the Andromeda Galaxy or moving away from us. Blueshift light tends to be emitted from objects that are moving closer. Red light wavelengths tend to be more stretched out the further you are from the object.īlue light wavelengths tend to be closer together. ![]() When something is moving away from something else, the light that is emitted is predominantly at the red end of the spectrum. This study shows that the spectrum of the diffusely scattered light is blueshifted in the. You're probably more familiar with Redshift as its talked about quite a bit. The redshift and width shrinkage increase with decrease of the coherently scattered light intensity. ![]() Whats the difference between Blueshift and Redshift?
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