Assertion: supernova's brightness | /r/CapableOf | change over timescale
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text: From atop Palomar Mountain in Southern California, where it is mounted on the 48-inch Samuel Oschin Telescope, the project's fully automated camera optically surveys roughly 1000 square degrees of sky per night (approximately 1/20th of the visible sky above the horizon), looking for transients--objects, including Type Ia supernovae, whose brightness changes over timescales that range from hours to days.