Now I understand the Fermi Paradox better. 🙂

Rationalising The Universe

Part I: The Question

The most simple questions that we can ask often turn out to be the biggest. Physicist Enrico Fermi is testament to this with his big ask ‘where is everyone?’ Where is everyone in the vast universe, why do we hear nothing but silence when we scour the night skies, where are all the aliens?

When we look up a particularly starry night sky we are only observing a very small proportion of the stars in our galaxy. Which in itself is a very very small proportion of the stars in our observable universe (note. observable universe, and that’s just the part closest surrounding us that we can receive light from!) Let’s throw some numbers into the mix.

Part II: The Calculation

There are 100-400 billion (yes billion that’s 10^9) stars in our Milky way galaxy. Now astronomers believe that there are roughly 100 billion galaxies in…

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