How big is the universe

The Universe is all of space and time. And their contents are, including planets, stars, galaxies, and all other forms of matter and energy. The size of the universe is still unknown. No one knows the actual size of the universe. It always will be a mystery how big the universe is. There are so many galaxies in the universe. We can't count all of them. Our solar system is a part of Milky way galaxy. Milky way galaxy is one of many galaxies in the universe. It is assumed that galaxies are distributed uniformly and the same in all directions, meaning that the Universe has neither an edge nor a center. The universe had a beginning and that is expanding.  As technology has evolved, astronomers are able to look back in time to the moments just after the Big Bang. But the size of the universe depends on a number of things, including its shape and expansion. The truth is, scientists can't put a number on it. So we can never know how big is the universe.