Olber's Paradox

The heavens hold more stars than earth has grains
Of sand, and given time, each tiny sun
Combined should make a world where starlight stains
The sky bright white and dark would be undone.
And yet the night remains. the dim stars gleam
Their separate ways, and constellations drawn
Connect their dots, while under them we dream
And sleep, then wake to such a thing as dawn.
The universe, expanding since its birth,
Is larger, older than its light; sublime,
The force that keeps this constant day from earth
The same that measures out our years -- is time:
The limitation that provides us night
And saves us all from unremitting light.

Robert W. Crawford (2004)