Caption: Prior to its integration into the Hubble Space Telescope, a technician adjusts the High Speed Photometer (HSP), one of the telescope's original scientific instruments. As its name implies, the device worked like a souped-up light meter and was capable of sampling starlight at a rate of 100,000 times per second. Built by scientists and engineers at UW-Madison Space Astronomy Lab and Space Science and Engineering Center, HSP was the only element of the giant orbiting telescope to be built by a university. It was removed from Hubble in 1993 and replaced by the optics package needed to correct the images blurred by the telescope's misshapen mirror.
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