In 2016, a study on Hubble images provided an estimate of two trillion galaxies, which is generally the number that is used in estimating the number of stars. However, estimates of the number of galaxies vary significantly, and range from as low as 100-billion to as high as 10-trillion. Since most stars exist within galaxies, estimating the number of galaxies in the universe is a good first step in estimating the number of stars in the universe. Rather, astronomers find ways of estimating the number of stars. Counting the number of stars in the universe would take millions upon millions of years, and so counting them individually is simply impossible. Even if you attempted to count all the stars in the Milky Way, it would be years before you finished. If you tried to count the stars individually, it wouldn’t take long for you to lose track. Estimating The Number Of Stars Hubble image of a distant galaxy containing many billions of stars.
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