Here's why:

* Sagittarius is located near the galactic center: The constellation is situated in the direction of the Milky Way's central bulge, which is home to a supermassive black hole.

* The constellation's shape: The Archer's celestial teapot is often used as a visual guide. Imagine pouring tea from the teapot; the direction the tea flows would be towards the galactic center.

However, it's important to note:

* The Milky Way's bulge isn't visible with the naked eye: While Sagittarius points in the general direction of the galactic center, it's not like you can actually see the bulge directly. The dense cloud of gas and dust obscures our view.

* The constellation itself isn't a physical arrow: It's just a pattern of stars that we perceive from Earth, and its "pointing" is an interpretation based on its appearance.

So, while the constellation Sagittarius may be a useful visual aid for finding the direction of the galactic center, it's not an exact pointer.