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e_r_k_sliked a comment in Astronomers Discover Black Hole Hiding In Plain Sight In Earth's "Backyard".12 months ago
e_r_k_s added a news bookmark.Given that each light-year — defined as the distance light travels in one Earth year — is about 6 trillion miles (9 trillion km), a black hole that lies 1,000 light-years away m...12 months ago
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