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#587361
Thu 01 Oct 2020 07:10:PM
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Joined: Feb 2001
Posts: 381,903
Launch Director
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OP
Launch Director
Joined: Feb 2001
Posts: 381,903 |
Matter swirling around supermassive black holes creates bursts of light that "echo" in nearby dust clouds. These traveling signals could serve as a new cosmic yardstick.
Source: 'Echo Mapping' in Faraway Galaxies Could Measure Vast Cosmic Distances
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