OK, so here's the thing about our universe: the further away an object is, the redder the tint. This has been attributed to the Doppler effect. Everyone is probably familiar with this effect, because that's what causes the siren to drop in pitch as the police car goes by. In the case of the siren, the sound drops in pitch because the waves are arriving at your ears less frequently. In the case of stars, the wavelength of the light gets longer because the waves are hitting you eyeballs less frequently.
So, now that we're clear on that, aren't these hyper links cool?
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