Based on current scientific understanding, it is believed that most galaxies in the universe contain solar systems, but it is not a guarantee that every galaxy has one. A solar system refers to a star or stars orbited by planets and other celestial bodies. Our own galaxy, the Milky Way, contains billions of stars, and it is estimated that a significant portion of those stars have planetary systems.
However, there are different types of galaxies, such as elliptical galaxies, which are generally older and contain fewer stars compared to spiral galaxies like the Milky Way. Elliptical galaxies may have a lower likelihood of hosting solar systems due to their different structure and star distribution. Additionally, irregular galaxies have a more chaotic structure and may also have a lower chance of having solar systems.
It is important to note that our knowledge of the universe is continually expanding, and new discoveries can always reshape our understanding. Therefore, while it is currently believed that most galaxies have solar systems, further observations and research may reveal new insights in the future.