This is M33, or the Triangulum Galaxy. It’s one of several galaxies present in the triangulum constellation, but it’s the most famous.
It’s the furthest thing visible to the naked eye at dark skies, it should be visible even in suburbs as a kind of haze visible with averted eyes. It’s 2.73 million light-years away.
Despite being so far away, it’s our neighbor, belonging to the family of nearby galaxies called the local group. It’s thought that it may orbit Andromeda.