The term "local horizon" refers to the apparent line where the sky meets the Earth, as viewed from a specific location. There are several synonyms for this concept, including the horizon line or the visible horizon. In astronomy, the local horizon may be referred to as the astrolabe horizon, or the plane that intersects the celestial sphere at the observer's location. Additionally, the edge of the world, the earth's rim, and the horizon circle are all terms that can be used to describe the local horizon. No matter what it is referred to, the local horizon is an essential part of observing and navigating the natural world.