The observable universe contains as many as an estimated 2 trillion galaxies and, overall, as many as an estimated 10 stars – more stars (and, potentially, Earth-like planets) than all the grains of beach sand on planet Earth. As mentioned earlier, the estimated number of galaxies was reduced in 2021 to several hundred billion based on data from New Horizons. The estimated total number of stars in an inflationary universe (observed and unobserved) is 10.