南十字星, or the Southern Cross, is a prominent constellation located in the southern hemisphere. It is known for its distinctive cross shape and is one of the most recognizable star patterns in the night sky. The constellation consists of five main stars, with Acrux being the brightest. The Southern Cross holds cultural significance for many southern hemisphere countries, including Australia and New Zealand. It is often used for navigation and is featured on several national flags, symbolizing guidance and identity for those in the southern regions of the world.