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Ep. 644: Is Earth… Normal?

Astronomy Cast

00:00

Are We Really Late to the Star Formation Party?

The earth formed four and a half billion years ago. As our universe has evolved with time, it has had the ability to create more and more heavy elements. We are one of the more metal stars out thereand this gives us a solar system full of rocky bodies that are made up of far more than just hydrogen and helium.

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