The Bullet Cluster (NIRCam)

Two massive galaxy clusters collide in this extraordinary scene from the Bullet Cluster, located 3.8 billion light-years away in the constellation Carina. Each cluster contains hundreds of galaxies bound together by gravity, along with vast amounts of gas, dust, and dark matter. The image spans roughly 6.3 million light-years across, capturing one of the most powerful cosmic collisions ever observed. Webb’s NIRCam (Near-Infrared Camera) reveals the central region in remarkable detail. Surrounding a bright spiral galaxy at the center are countless distant galaxies and faint background objects. Researchers used these precise images to map the cluster’s mass and explore how visible and invisible matter are distributed. By tracing the faint glow of intracluster stars, which are no longer bound to individual galaxies, scientists confirmed that this diffuse light aligns closely with dark matter, offering a new way to study the universe’s most mysterious substance.