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The discovery of a star racing around the Milky Way galaxy’s central black hole could be crucial to revealing the fabric of space and time around black holes—and may allow University of Toronto scientists to test Einstein’s theory of relativity.

Above, the two W. M. Keck Telescopes on Mauna Kea, Hawaii, observe the galactic center. The lasers create an artificial star in the Earth’s upper atmosphere, which the scientists use to measure the blurring effects of the lower atmosphere (the effect that makes the stars twinkle in the night sky). 

Full story at Futurity.

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Photo credit: Ethan Tweedie