An ember's arc

It began, as these things do
From clouds in the aether
With untold time, they coalesced
Their will apart grew weaker

This cascade of embers
Fused into a star's ignition
A crucible for their collapse
Seething crux of its ambition

The axiom of this expanse
Unrelenting pressure
Every moment, in each place
Collisions beyond measure

An ordinary pair that met
Whilst merging into one
Heaved and spat a mote of light
Adrift within the Sun

Without a bind, it cut away
Against all else it stood
As swift as anything that was
And had, or could, that would

The axiom when it began
Unable to elude
Every moment, in each place
Destroyed, exchanged, renewed

At the surface once emerged
Radiant in birth
Free at last, its final form
The photon dashed for Earth