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We present results on the morphological and structural evolution of a totalof 4265 galaxies observed with JWST at $1.5 < z < 8$ in the JWST CEERSobservations that overlap with the CANDELS EGS field. This is the biggestvisually classified sample observed with JWST yet, $\sim20$ times larger thanprevious studies, and allows us to examine in detail how galaxy structure haschanged over this critical epoch. All sources were classified by six individualclassifiers using a simple classification scheme aimed to producedisk/spheroid/peculiar classifications, whereby we determine how the relativenumber of these morphologies evolves since the Universe's first billion years.Additionally, we explore structural and quantitative morphology measurementsusing \textsc{Morfometryka}, and show that galaxies at $z > 3$ are notdominated by irregular and peculiar structures, either visually orquantitatively, as previously thought. We find a strong dominance ofmorphologically selected disk galaxies up to $z = 8$, a far higher redshiftthan previously thought possible. We also find that the stellar mass and starformation rate densities are dominated by disk galaxies up to $z \sim 6$,demonstrating that most stars in the universe were likely formed in a diskgalaxy. We compare our results to theory to show that the fraction of types wefind is predicted by cosmological simulations, and that the Hubble Sequence wasalready in place as early as one billion years after the Big Bang.Additionally, we make our visual classifications public for the community.

The JWST Hubble Sequence: The Rest-Frame Optical Evolution of Galaxy Structure at $1.5 < z < 8$