Warped Space

Day 21 of the 2025 Space Telescope Advent Calendar : Warped Space. This Hubble view of Galaxy Cluster Abell 209, about 2.8 billion light-years away, shows more than 100 galaxies. The incredible mass of the galaxies together warps and magnifies images of background galaxies and stars in a process called gravitational lensing, which can be seen in the stretched and smeared clumps toward the center of the image. ESA / Hubble & NASA, M. Postman, P. Kelly See the full advent calendar here , where a new image will be revealed each day until December 25. Explore More Topics

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