We need more data and much deeper data," Lehnert said.
我们需要更多和更深入的数据，”Lehert说。
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"I don't think this is the limit, perhaps not even that close to it," lead researcher Matthew Lehnert, with France's Observatoire DE Paris, told Discovery News.
Lehnert says it will be increasingly more difficult to find these objects, since they would be extremely faint and have much fewer stars and gas to make their presence known.