Thanks everyone!

And no, the data is not available as a density. It represents
light freed at the epoch of recombination when the universe became
transparent about 300.000 years after its formation. Although every
point in space was therefore emitting light in all directions, what
we see today is the light arriving from the (2d) spherical shell
around us at the distance(*) traversed by photons during the
elapsed time (about 13.7 billion years).

The data shows slight variations in density that were the seeding
points for galaxies and the large scale structure of the universe.


(*) The term distance is a bit of a simplification considering
that all the time the universe was also expanding.

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