There are many flags that show a moon and star, but the most famous one is likely the flag of Turkey. It features a white crescent moon and a white five-pointed star on a red background.

However, here are some other flags that also feature a moon and star:

* Pakistan: A white crescent moon and a white five-pointed star on a green background.

* Malaysia: A yellow crescent moon and a yellow fourteen-pointed star on a blue background.

* Azerbaijan: A red crescent moon and an eight-pointed star on a blue background.

* Uzbekistan: A white crescent moon and twelve white stars on a blue background.

* Tunisia: A red crescent moon and a white five-pointed star on a white background.

* Libya: A green crescent moon and a green five-pointed star on a black background.

These are just a few examples, and there are many other flags with moon and star combinations. The specific design and arrangement of these symbols varies greatly between flags.