Word: hole
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...Here's the tricky part. There's not anything they've measured that tells you that there's a black hole, Kirshner says. "What the measurement tells you is that it's a large mass in a small space...
...black hole observed by the Hubble telescope also emits narrow jets of electrons traveling at nearly the speed of light and extending light years into space...
Geller says such "radiation being shot out of a firehose" is consistent with a black hole absorbing neighboring celestial objects and squeezing out their energy...
...everyone is as convinced as Press that the Hubble finding is actually a black hole...
Kirshner says the phenomenon is only explained as a black hole by default because astronomers don't know of any other theory that fits the data...