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Big meets small

The Ouroboros of today's physics.
Hester_Jeff
Space is big. Really big. You just won’t believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it’s a long way down the road to the chemist, but that’s just peanuts to space.” (Douglas Adams, The Hitchhiker’s Guide to the Galaxy)

This issue of Astronomy follows the journey taken in the 1977 short film Powers of Ten outward into the cosmos. Twenty-six powers of 10 separate the scale of the observable universe from the scale of the room that likely surrounds you as you read these words. Yet the trip outward is only part of the story. Instead of adding zeros to the left of the decimal point, we can add zeros to its right, taking us into an ever more microscopic realm. Each journey is as extraordinary as the other.

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