20 Dec 2024

Universe 'lumpier' than originally thought, research shows

From Nights, 10:17 pm on 20 December 2024
This image courtesy of Fermilab-US Department of Energy (Dark Energy Survey Collaboration) shows a zoomed-in image from the Dark Energy Camera of the barred spiral galaxy NGC 1365, in the Fornax cluster of galaxies, which lies about 60 million light years from Earth. Eight billion years ago, rays of light from distant galaxies began their journey to Earth. That ancient starlight has now found its way to a mountaintop in Chile, where the newly constructed Dark Energy Camera, the most powerful sky-mapping machine ever created, has captured and recorded it for the first time.That light may hold within it the answer to one of the biggest mysteries in physics -- why the expansion of the universe is speeding up.

This image courtesy of Fermilab-US Department of Energy (Dark Energy Survey Collaboration) shows a zoomed-in image from the Dark Energy Camera of the barred spiral galaxy NGC 1365, in the Fornax cluster of galaxies, which lies about 60 million light years from Earth. Photo: AFP / Fermilab

The universe is lumpier than first thought! New findings from a team of New Zealand scientists shows that the universe does not expand at a constant, flat rate, but in a fluctuating or lumpy way.

The research completely changes the dominant way of thinking about the nature of our universe, previously explained using a theory called 'dark energy'.

Lead researcher Professor David Wiltshire from the University of Canterbury joins Maggie Tweedie to explain.