A team of researchers has created a new catalogue containing information on millions of distant galaxies, including their distances and appearances going back up to 10 billion years. This vast dataset, a result of the Physics of the Accelerating Universe Survey (PAUS), allows astronomers to study the evolution of galaxies over cosmic time.
An atlas doesn’t seem to be an essential item in cars these days but think about them and most people will think about distances. An atlas of the stars not only covers distances but must also take into account time too. The Andromeda galaxy for example is so far away that its light takes 2.5 million years to reach us.
This new NASA/ESA Hubble Space Telescope shows Messier 96, a spiral galaxy just over 35 million light-years away in the constellation of Leo . It is of about the same mass and size as the Milky Way. It was first discovered by astronomer Pierre Méchain in 1781, and added to Charles Messier’s famous catalogue of astronomical objects just four days later. The galaxy resembles a giant maelstrom of glowing gas, rippled with dark dust that swirls inwards towards the nucleus.
The William Herschel Telescope, part of the Isaac Newton group of telescopes, located on Canary Island. Credit: ing.iac.es Understanding the structure of the universe is to understand the distribution of dark matter and dark energy. Dark energy is thought to make up 70 percent of the Universe but we still don’t know what it is. We can see its effect in the accelerated expansion of the Universe but its nature remains a mystery to us. The new survey will help to shine a light on dark energy with its comprehensive data set of galaxies that span more than 10 billion light years.
Astronomy Galaxies Catalogues Space Telescope Hubble
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