15 years before its official discovery it was photographed in 1915 by Lowell Observatory which didn't know what it was
Since you have landed on this page then most probably you are looking for the 15 years before its official discovery it was photographed in 1915 by Lowell Observatory which didn't know what it was answer. This question was last seen on October 22 2021 Jeopardy TV Game Show.
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For more questions from this episode visit Jeopardy October 22 2021 Answers