RT @AstronomyMag: To map the universe, astronomers string together distance measurements to ever-farther objects, like climbing rungs on a cosmic ladder. https://t.co/sKrEpKBFCE

To map the universe, astronomers string together distance measurements to ever-farther objects, like climbing rungs on a cosmic ladder. https://t.co/sKrEpKBFCE

— Astronomy Magazine (@AstronomyMag) December 27, 2019

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December 31, 2019 at 09:18PM
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