More than a year’s worth of expensive data used to trace the shape of the Milky Way galaxy could become worthless as a result of today’s closure of U.S.-based radio telescopes because of the government shutdown.

“Holy cow, this is really bad,” radio astronomer Mark Reid said when informed by ScienceInsider that the telescopes were going offline. “If they don’t operate the telescopes, it could mean a year’s worth of data becomes useless.” And it would be a costly loss, he adds, estimating that the data cost $500,000 to collect.

Reid is a U.S. government employee who works for the Smithsonian Astrophysical Observatory, part of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts. Like hundreds of thousands of other federal workers, he’s been at home since the shutdown began on Tuesday. Meanwhile, he’s been trying to use some of his time off productively, thinking about his collaborative work with an international team on measuring and mapping the great spiral arms of the Milky Way.

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