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Watch QuickTime video:
Seeing a monster |
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At the center of our galaxy lies a giant black hole. Invisible
though it is, its gravity exerts a strong influence on the stars
that surround it.
The animation plots the actual positions of the
stars at the galaxy’s core over the course of six years.
From their motions, astronomers can pinpoint the location of the
black hole and measure its mass – 2 million Suns! |
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