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On account of the Amazing Stories-style title and the slightly raised orange lettering on the book jacket, The Black Hole at the Center of Our Galaxy seems as if it might be a bit fanciful. But Fulvio Melia’s treatise on our galaxy’s “supermassive” mystery spot, known as Sagittarius A*, includes far more information about radio telescopes and the theory of relativity than it does about tribbles and tractor beams. In fact, distinguished physicist and astronomer Melia doesn’t even write that this black hole will…destroy us all!!! That’s probably because he’s delighted that we might have the technology to obtain actual images of the hulking sky beast’s event horizon within the next decade. (The thing is, after all, 28,000 light years away.) If short on disaster scenarios, the book does hold other delights: In explaining complex scientific phenomena, Melia conjures strange parallels typical of the scientist trying to write for a popular audience. Our ability to localize the mass of Sagittarius A* from Earth, he writes, is comparable to knowing “which of two neighboring fruit vendors has the greater number of oranges to sell in Melbourne’s Queen Victoria Market from a vantage point in San Francisco.” That’s, um, impressive, I guess. Clarify at 7 p.m. (see City List for other dates) at Politics and Prose, 5015 Connecticut Ave. NW. Free. (202) 364-1919. (Josh Levin)