Atomic physicists have a unit called the barn, about the cross sectional area of a uranium nucleus.
Astrophysicists have a unit called the Hubble, which is right in the middle of the range of estimates for the width of the universe.
Imagine a beer bottle, a barn in cross section by a Hubble in length.
It holds almost exactly a litre. 2 pints if you're lucky and the universe expanded a bit while you were waiting to catch the barman's eye.
If you drank that beer an atom at a time, you'd drink the width of the universe.
Astrophysicists have a unit called the Hubble, which is right in the middle of the range of estimates for the width of the universe.
Imagine a beer bottle, a barn in cross section by a Hubble in length.
It holds almost exactly a litre. 2 pints if you're lucky and the universe expanded a bit while you were waiting to catch the barman's eye.
If you drank that beer an atom at a time, you'd drink the width of the universe.
