A light of understanding into black holes

Or perhaps the Great Eye of Sauron, the foreboding nucleus of J.R.R. Tolkien’s fantasy classic “Lord of the Rings.” But for the first time, humans have finally seen what was once merely predicted: a black hole. Scientists and other thinkers have long speculated that black holes are real and observable. “We have seen what we thought was unseeable,” says Shep Doeleman, an astronomer at the Harvard-Smithsonian Center for Astrophysics, who headed the project.

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