Naturally, unpolarized light has an electric field that points in all directions perpendicular to the direction of propagation. Polarization of light is the filtering of the light to reduce the directions of the electric field to a single plane. A polarimeter is a device that can measure the intensity of light at different polarization angles. Our device is a telescope-mounted rotating polarimeter that will enable measurement of the polarization signatures of astronomical bodies. Ongoing work is mounting the device to the USNA telescope and observing a star with a known polarization signature to determine the accuracy of the device.