Astronomers try to pinpoint the Hubble Constant, but it leads to confusion.🧐
The new examination of data from the 32-year-old Hubble Space Telescope attempts to identify how quickly the universe expands, and how much that expansion is accelerating through a number called the Hubble Constant .The number is a notoriously tough one to pin down because different observatories looking at different areas of the universe have produced different results.
Riess leads a scientific collaboration investigating the universe's expansion rate called SHOES, which stands for Supernova, H, for the Equation of State of Dark Energy."This is what the Hubble Space Telescope was built to do, using the best techniques we know to do it. This is likely Hubble's magnum opus, because it would take another 30 years of Hubble's life to even double this sample size," Riess said.
Riess is leading the biggest and likely last major update on the Hubble constant with new results more than doubling the prior samples of cosmic distance markers. His team also reviewed all of the prior data that takes into account over 1,000 Hubble orbits. "The Hubble constant is a very special number. It can be used to thread a needle from the past to the present for an end-to-end test of our understanding of the universe. This took a phenomenal amount of detailed work," said Dr. Licia Verde, a cosmologist at ICREA and the ICC-University of Barcelona, speaking about the SHOES team's work.The team analyzed 42 of the supernova milepost markers with Hubble that are seen exploding at a rate of about one per year.
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