Galaxy cluster MACS J0416.1-2403 with dark matter map
This is a NASA/ESA Hubble Space Telescope image of the galaxy cluster MACS J0416.1-2403. Shown in blue on the image is a map of the dark matter found within the cluster. This cluster was part of a study of 72 galaxy cluster collisions which determined that dark matter interacts with other dark matter even less than previously thought.
Credit: NASA, ESA, D. Harvey (École Polytechnique Fédérale de Lausanne, Switzerland), R. Massey (Durham University, UK) and HST Frontier Fields