how many galaxies observable universe
The best estimate from a 1999 study set that number at about 125 billion galaxies, but a 2013 study indicated that there are 225 billion galaxies in the observable universe.
For years, astronomers were convinced that a structure known as the Sloan Great Wall was the biggest-known structure in the universe. This vast cluster of galaxies and other cosmic matter is a mind-boggling 1.4 billion light-years across. But just recently they found something even bigger.