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Black Holes Hide in Our Cosmic Backyard

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Galaxy NGC 1448 with active galactic nucleus

Galaxy NGC 1448 with active galactic nucleus.

Credit: Carnegie-Irvine Galaxy Survey/NASA/JPL-Caltech

Monster black holes sometimes lurk behind gas and dust, hiding from the gaze of most telescopes. But they give themselves away when material they feed on emits high-energy X-rays that NASA's NuSTAR (Nuclear Spectroscopic Telescope Array) mission can detect.

From Jet Propulsion Laboratory/NASA
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