Is there a Black Hole in our Solar System?
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See this Sixty Symbols video.

This market closes when scientific consensus has reached near certainty on this issue, either by finding a black hole, or by exploring the solar system enough that it's considered essentially impossible. Close date on this market will be extended indefinitely.

Note that potential man-made black holes, such as those some have proposed could occur in particle colliders, do not count. This question refers to black holes as might be found by astronomers.

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