The supermassive black hole at the centre of our Galaxy has a strong influence on its surroundings. Astronomers cannot yet see this beast directly but they now have a much better idea of its size.
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Melia, F. X-rays from the edge of infinity. Nature 413, 25–26 (2001). https://doi.org/10.1038/35092644
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DOI: https://doi.org/10.1038/35092644
