* Northern Hemisphere: The most familiar constellation in the northern hemisphere is Ursa Major (the Great Bear), specifically its asterism known as the Big Dipper. It's easy to spot and is used to find other stars like Polaris (the North Star).

* Southern Hemisphere: The most familiar constellation in the southern hemisphere is Crux (the Southern Cross). It's a small but prominent constellation, easily recognizable by its distinctive cross shape. It's also used to find other stars and directions in the southern sky.