Quasar Observations Refine Hubble Constant Estimates

Credit: Hubble Space Telescope: ESA
HOUSTON—H0LiCOW, an international collaboration of astronomers, has developed an independent estimate for the Hubble Constant. The unit of measurement has been refined over the past century to measure the expansion rate of the universe. The calculation is crucial to a deeper understanding of dark...
Mark Carreau

Mark is based in Houston, where he has written on aerospace for more than 25 years. While at the Houston Chronicle, he was recognized by the Rotary National Award for Space Achievement Foundation in 2006 for his professional contributions to the public understanding of America's space program through news reporting.

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