Number of Galaxies in the Known Universe

The observable universe is estimated to contain at least 100 billion galaxies, but this number could be much higher. This estimate is based on observations from the Hubble Space Telescope and other instruments that allow astronomers to observe a small portion of the universe and extrapolate the number of galaxies in the larger universe. However, there may be many more galaxies beyond what we are able to observe with current technology, which could increase the total number significantly.