Using the power of two space telescopes, Hubble and Gaia, astronomers have made the most precise measurement to date of the universe’s expansion rate, with the present rate of expansion measured to be 73.5 kilometers (45.6 miles) per second per megaparsec, as reported in the Astrophysical Journal.

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Using the power of two space telescopes, Hubble and Gaia, astronomers have made the most precise measurement to date of the universe’s expansion rate, with the present rate of expansion measured to be 73.5 kilometers (45.6 miles) per second per megaparsec, as reported in the Astrophysical Journal.