Thought for the month

“You do ill if you praise, but worse if you censure, what you do not understand.” Leonardo da Vinci, Italian Renaissance polymath (1452 – 1519).

Wednesday, 6 June 2018

73 or 67?

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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