The NASA/ESA Hubble Space Telescope has unveiled a stunning image of the Abell 209 galaxy cluster, located 2.8 billion light-years away in the constellation Cetus. This massive cluster, comprising over a hundred galaxies, showcases the intricate interplay of visible galaxies, invisible dark matter, and spacetime-warping gravitational lensing. The Abell 209 galaxy cluster, with its golden […]