Galaxies selected to measure the Hubble Constant
These galaxies are selected from a Hubble Space Telescope program to measure the expansion rate of the universe, called the Hubble constant. The value is calculated by comparing the galaxies' distances to the apparent rate of recession away from Earth (due to the relativistic effects of expanding space). (NASA, ESA, W. Freedman (University of Chicago), ESO, and the Digitized Sky Survey)
Astrophysics, Science, Space

New Hubble Constant Measurement Adds to Mystery of Universe’s Expansion Rate

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Galaxies selected to measure the Hubble Constant
These galaxies are selected from a Hubble Space Telescope program to measure the expansion rate of the universe, called the Hubble constant. The value is calculated by comparing the galaxies’ distances to the apparent rate of recession away from Earth (due to the relativistic effects of expanding space). (NASA, ESA, W. Freedman (University of Chicago), ESO, and the Digitized Sky Survey)

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