Its part of science!
Edit : In astronomy, the Doppler effect is the change in wavelength of light caused by movement of a light source such as a star or a whole galaxy.
The term "red shift" refers to the increase in the light's wavelength from the
blue to the red end of the spectrum. This happens when a light source is
moving away from us.
I don't want to over complicate things, but there is a similar thing
called the "cosmological red shift ", but that's caused by the expansion
of space itself.
The Doppler redshift was discovered by Hippolyte Fizeau in 1848.
Christian Doppler, and Austrian Physcist .
a star is moving AWAY FROM EARTH
A blue shift is observed in the spectrum from an object approaching the observer whereas a red shift is observed for a receding object.
One of the most reliable methods employed presently is using Hubbles Laws and Constant, utilizing the red shift. RED SHIFT A+LS (:
The Doppler redshift was discovered by Hippolyte Fizeau in 1848.
The Doppler effect.
a star is moving AWAY FROM EARTH
Christian Doppler, and Austrian Physcist .
A Doppler red-shift is a shift in recognizable features of a star's spectrum from the wavelengths where we know they belong toward longer wavelengths. Such a shift can be caused by the star's moving away from us, and that's how it's interpreted when astronomers see it. A Doppler blue-shift is a shift in recognizable features of a star's spectrum from the wavelengths where we know they belong toward shorter wavelengths. Such a shift can be caused by the star's moving toward us, and that's how it's interpreted when astronomers see it.
The Doppler Shift is a change in frequency due to the Doppler Effect.
A blue shift is observed in the spectrum from an object approaching the observer whereas a red shift is observed for a receding object.
That is called a red shift or a Doppler shift.
Actually, it wasn't the Doppler-effect that lead to the Big Bang theory, but the red-shift of remote galaxies. Although it was initially thought that this red-shift might be caused by a Doppler-effect, it is now understood that this red-shift is caused by the metric expansion of space itself.
One of the most reliable methods employed presently is using Hubbles Laws and Constant, utilizing the red shift. RED SHIFT A+LS (:
The change in frequency is caused by the Doppler Effect
Doppler effect Red Shift