What is the sky

What is the sky, if not arms
Stretched wide to embrace
Stars and clouds racing across
A moon encircled by rainbows
On a frozen January night,
On down to what lies past
The roots of the crabgrass
Hopelessly entangled beneath our feet?
Infinity reaches up above
Beyond moons, stars, galaxies, and event horizons,
Past the edge of what we can see
In the Large Hadron Collider,
With its fleeting blips of electrons
Hinting of more than we can measure,
Arms blithely embracing
Each forgotten swallow fallen to the ground.