The European Space Agency’s Gaia mission has produced
the richest star catalogue to date, with measurements of nearly
1.7 billion stars. Analysis of the data from the pulse rates of Cepheid
stars, has suggested that the universe is expanding faster than previously
thought. The new data puts the Hubble constant at 73, which translates into
galaxies moving away from us 73km per second faster for each additional
megaparsec of distance between us and them. Estimates based on the cosmic
microwave background have a value of 67.
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