The Butcher-Oemler Effect

Balmer Line Spectrum

Hydrogen (not actually Blue)

(or to scale)

This is an example of red shift. On the left is a ray of light from the Sun, and on the right one from a far off galaxy. As you can see, all the lines shift towards the red end of the spectrum due to red shift

The universe expands, much like this raisin bread.

The Butcher-Oemler Effect

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Stephan’s Quintet

Virgo Supercluster

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