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https://phys.org/news/2023-06-astronomers-method-galaxy-distances.html
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Astronomers propose novel method of measuring galaxy distances - Phys.org
6/20/23 at 1:33pm
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Phys.Org
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Li Yuan
36 words
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The universe consists of hundreds of billions of galaxies, and for nearby galaxies, distances are mainly measured by classical Cepheids and RR Lyrae (RR Lyr) stars.
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