The coordinates of the historic village is (-4 1/2, 5 1/4). The coordinate of the science center is (-4 1/2, -1 3/4). Halfway between the historic village and the science center is given by ((-4 1/2 + -4 1/2) / 2, (5 1/4 + -1 3/4) / 2) = (-9 / 2, 3 1/2 / 2) = (-4 1/2, 1 3/4)
Therefore, the coordinate of the planetarium is (-4 1/2, 1 3/4).
