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.’s Open University. Follow him on Twitter @sciencef1rst.
Globular clusters are collections of ancient stars that date back to a galaxy's infancy, so they can contain clues about the early stages of galactic formation, growth and evolution. Looking at the 12 compact objects surrounding the Sparkler Galaxy, the Canadian NIRISS Unbiased Cluster Survey team that found five of them are indeed globular clusters.
"What we're trying to do is we're trying to age-date all the objects in the universe — the stars, the galaxies and the globular clusters — because we want to know, when is it that stars started to be born?" Lamiya Mowla, the study's co-author and also an astronomer at the University of Toronto, told Space.com. contains an estimated 150 globular clusters, but scientists have struggled to determine their ages.
Zooming in on the James Webb Space Telescope's first deep-field image shows a"sparkler galaxy" and a globular cluster. Together, the magnification and the multiple images created by gravitational lensing both helped with the study of these objects but also helped confirm that these clusters do indeed orbit the Sparkler Galaxy and aren't just"overlaid" on top of it in JWST's line of view.
Figuring out by how much the Sparkler Galaxy and its clusters are magnified could help determine properties such as their age and their distance fromThe CANUCS team will also be using JWST telescope in October to study five massive clusters of galaxies, around which they expect to find more systems like those around the Sparkler Galaxy.
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Evidence of dinosaur-killing asteroid impact found on the moonRobert 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.’s Open University. Follow him on Twitter sciencef1rst.
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