EarthSky News explains Genesis
In the beginning,
after the Big Bang,
stars in clusters
formed invisible
to one another through
dense hydrogen gas.
Space was opaque.
And darkness was upon
the face of the deep.
Starshine slowly ionized
the gas, turning it clear.
First one, then many
glimmers could be seen.
Bubbles of transparency
merged to encompass
whole galaxies until
a whole galaxy was
small as a pea inside
a hot-air balloon
by comparison.
Later (a hundred million
years later) the bubbles
had all merged –the whole
universe transparent
to the light. Fiat lux.
