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National Radio Astronomy Observatory (NRAO)

New Method May Resolve Difficulty in Measuring Universe’s Expansion

9 Jul 2019, 12:58 UTC
New Method May Resolve Difficulty in Measuring Universe’s Expansion NRAO/AUI/NSF

Astronomers using National Science Foundation (NSF) radio telescopes have demonstrated how a combination of gravitational-wave and radio observations, along with theoretical modeling, can turn the mergers of pairs of neutron stars into a “cosmic ruler” capable of measuring the expansion of the Universe and resolving an outstanding question over its rate.

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