How big is the universe?

About 93,000,000,000 light years, according to this animation of the scale of the universe.

From that page: a computer pixel is 0.3mm wide. A water molecule (or a Mickey Mouse head!) is 280pm wide. Alpha Centauri A is 1.5 Gm (1.5 billion metres) in diameter. The Crab Nebula, which has a pulsar I’m examining on my project, is 70 Pm or approximately 70 light years across.

Now, how are we going to colonise it all?


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About Philip

I'm a physics graduate, sci-fi writer, budding game designer, and amateur human.

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