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- THE WEEK, Page 35HEALTH & SCIENCEX Marks the Spot
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- A bizarre cosmic cross may be the imprint of a giant black hole
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- Astronomers have long suspected that the whirlpool galaxy,
- 20 million light-years away, harbors in its core a black hole, a
- superdense knot of matter whose gravity is so powerful that even
- light can't escape. Now a photograph taken by the Hubble Space
- Telescope has convinced them. The picture, released last week,
- reveals a giant X at the galaxy's center. The scientists think
- one arm of the X is a massive, doughnut-shaped cloud of dust
- swirling around the hole. The doughnut is seen edge on, hiding
- the black hole from view, but two cone-shaped beams of light
- emitted by hot gas closer in can be seen escaping out the sides.
- As for the second arm, no one knows what it is.
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