Which state in the US has a flag depicting a constellation?

The flag of the state of Alaska was suggested by a young Alaska Native boy, Benny Benson, in 1927. He recommended that the flag include only the arrangement of the stars of the Big Dipper constellation and Polaris, the North Star. The simple design of gold stars on a dark blue background emotes the same image as staring at the night sky from the boreal state of Alaska.

If done correctly, Polaris is depicted as a larger gold star than the other seven since it is brighter in the sky. The Big Dipper, a part of the Great Bear constellation, is quite easy to pick out in the night sky. As the Earth rotates on its axis, the orientation of the Big Dipper is sometimes so that it would apparently catch water falling downward. At other times the orientation would make the dipper look like it is spilling the water out. In essence, the furthest stars from the handle form a line that points at Polaris and those appear to rotate around Polaris as viewed from the Earth.

Of note, the flags of both Maine and Texas contain a single star.