For the previous 10 years cosmologists have been left scratching their heads over why two strategies for measuring the universe’s charge of growth present completely totally different outcomes. There are two potential options to the puzzle, generally known as the Hubble pressure: both one thing is incorrect with the measurements or one thing is incorrect with our mannequin of the universe. It was hoped that observations from the James Webb area telescope would possibly shed some gentle on the issue, however as an alternative outcomes revealed final week have continued to muddy the waters. To know why the growth charge of the universe stays a thriller, and what is likely to be wanted to lastly pin it down, Madeleine Finlay speaks to Catherine Heymans, the astronomer royal for Scotland and a professor of astrophysics on the College of Edinburgh
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