They're light years away, man, and that's pretty far
        (lightspeed's the limit, the big speed limit)
But there's plenty we can learn from the light of a star
        (split it with a prism, there's little lines in it)
By looking at the spectrum at the light that's glowing
        (wavelengths of emission, measured with precision)
Its Doppler Shift will tell us if it's coming or going
                        
Doo doo doo doo doo-ooo 

That's the Doppler Shift - you see it, it's true
Doppler Shift - to the red or the blue
                          
When a star is approaching and it's coming our way
Its spectrum seems bluer, won't you hear what I say
And when a star's retreating way out of range
And the scientist measures its frequency change
Well that's a redshift, redshift
If the star is moving away

By reading Doppler Shifts of all we see in the skies
        (clusters of galaxies, near and far)
We get the big picture and a big surprise
        (redshifts going, redshifts going)
The Universe is growing and expanding away
        (galaxies are speeding, speeding away)
But maybe gravity will shrink it back some day
                        
Owwwwwwwwwwwww-eeeeeeeeeee
                          
Doppler Shift