This morning the teachers were talking about the way that the universe expanding, and what we see as galaxies move away from us. A standard analogy is to think about baking a loaf of bread with raisins. As the bread bakes, and rises, each raisin moves away from each other since the bread expands.

[caption id="" align="aligncenter" width="306"]<a href="http://hyperphysics.phy-astr.gsu.edu/hbase/astro/hubble.html"><img alt="" src="http://hyperphysics.phy-astr.gsu.edu/hbase/astro/imgast/uexp.gif" width="306" height="141" /></a> check out http://hyperphysics.phy-astr.gsu.edu/ for a more full explanation.[/caption]

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