Here's why:

* Constellations: These are groups of stars that appear close together in the sky from our perspective on Earth. While the stars in a constellation are often very far apart from each other in space, their apparent proximity creates a recognizable pattern.

* Asterisms: These are smaller, less formal patterns within constellations or even across constellations. For example, the Big Dipper is an asterism within the constellation Ursa Major (Great Bear).

Let me know if you'd like to learn more about constellations!