Abstract

I will present the cosmological implications from the final cosmological measurements of clustering using galaxies, quasars, and Lyα forests from the completed Sloan Digital Sky Survey (SDSS) lineage of experiments in large-scale structure. These experiments, composed of data from SDSS , SDSS-II, BOSS , and eBOSS, offer independent measurements of baryon acoustic oscillation (BAO) measurements of angular-diameter distances and Hubble distances relative to the sound horizon, rd, from eight different samples and six measurements of the growth rate parameter, fσ8, from redshift-space distortions (RSD). This composite sample is the most constraining of its kind and allows us to perform a comprehensive assessment of the cosmological model after two decades of dedicated spectroscopic observation. I will discuss the constraints on dark energy, massive neutrinos, and the Hubble tension. Additionally, galaxy clustering can be used to constrain primordial non-Gaussianity (PNG) through the scale dependent halo bias. I will present constraints on PNG from the SDSS quasar sample.