Word: hole
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Professor of Astronomy Margaret J. Geller, who teaches Astronomy 14, "The Universe and Everything," says the black hole could have accumulated such a great mass by "gobling" up nearby objects for a few billion years...
...argue that there's a black hole there because of the motions that it causes," he says...
...such data showed that there was an unusual amount of mass in a relatively small volume-the telltale sign of a black hole...
...essence the Hubble telescope made an existing argument stronger, since scientists using similar techniques had already suspected the presence of a black hole in the M87 galaxy...
Even simple pictures taken by the Hubble suggest the existence of a black hole...