Window of Possibility

"We live on Earth. Earth is a clump of iron and magnesium and nickel, smeared with a thin layer of organic matter, and sleeved in vapor. It whirls along in a nearly circular orbit around a minor star we call the sun. 

I know, the sun doesn't seem minor. The sun puts the energy in our salads, milkshakes, hamburgers, gas tanks, and oceans. It literally makes the world go round. And it's huge: The Earth is a chickpea and the sun is a beach ball." 

So begins this piece, that goes onto explain why the Hubble Ultra Deep Field is the most incredible photograph ever taken.

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