Robert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.
A Euclid image of the Perseus cluster of galaxies bathed in a gentle, soft blue light emanating from orphan stars. These orphan stars are dispersed throughout the cluster, extending up to 2 million light-years from its centre.Using the Euclid space telescope, scientists have discovered a staggering 1.5 trillion orphan stars drifting through a massive cluster of thousands of galaxies, one of the largest structures in the cosmos. of the Perseus cluster with ghostly blue light.
A manipulated image of the Perseus cluster showing the two brightest galaxies brightest galaxies in the cluster, NGC 1275 and NGC 1272 at ist heartThe key to understanding orphan stars in Perseus was Euclid's ability to see the faintest light in the cluster, the intracluster light, which comes not from its galaxies but from between them.
The team determined that some of these free-wandering stars in intracluster space were dragged away from the outskirts of galaxies via interactions with other galaxies. Other orphan stars they found came from smallerWhat the team discovered next took them by surprise. Once ripped from their home galaxies, intracluster stars are expected to begin orbiting thein the cluster they find themselves isolated in, almost like a lost child in the mall gravitating toward the nearest adult.
Zoomed in images of the Perseus cluster as seen by Euclid show dwarf galaxies that have survived interactions with larger galaxies.The same researchers also used Euclid's sensitive visible light capabilities to spot 50,000 free-flying densely packed and spherical collections of tens of thousands to millions of stars called"" in the Perseus galaxy cluster.
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