NASA's James Webb Space Telescope has detected and "weighed" a galaxy - seen 600 million years after the Big Bang - that is similar to what our Milky Way galaxy might have looked like at the same stage of development.
Nicknamed the Firefly Sparkle, this young galaxy is gleaming with star clusters - 10 in all - that may be signs that early galaxies form by fragmenting into giant star clusters, with some surviving today as globular clusters.
The lead co-authors of the study, published in Nature, are Wellesley College's Lamiya Mowla and Columbia University's Kartheik Iyer - both former postdoctoral researchers at the University of Toronto's Dunlap Institute for Astronomy & Astrophysics.
