The NASA/ESA Hubble Space Telescope captured an image of the galaxy cluster Abell 209 located 2.8 billion light-years away.
Abell 209 contains over a hundred galaxies separated by millions of light-years, with invisible dark matter and hot gas filling the space between galaxies.
Hubble's observations of Abell 209 help astronomers understand dark matter and dark energy by studying gravitational lensing effects and mapping mass distribution within the cluster.
The image of Abell 209 reveals subtle signs of gravitational lensing, showcasing the cluster's mass distribution and providing valuable insights into the evolution of the universe.