Amen to this illustration (via +Aaron Boodman), but the overall point of the article itself is even more fascinating:

"So all that we see — the billions of stars in our galaxy, the hundreds of billions of galaxies lighting up the observable Universe — is just a teeny-tiny fraction of what’s actually out there, beyond what we can see... less than 0.0001% of the volume of the Universe is presently or will ever be observable to us."
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