Day 13 of the 2025 Space Telescope Advent Calendar: A Sea of Galaxies
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The 13th day of the 18th annual Space Telescope Advent Calendar features part of a dense cluster of galaxies—a wide variety of shapes, colors, and distances.

An image of many glowing galaxies in deep space, in various shapes and colours, on a black background

ESA / Webb, NASA & CSA, G. Rihtaršič, R. Tripodi

Day 13 of the 2025 Space Telescope Advent Calendar: A Sea of Galaxies. The James Webb Space Telescope pointed its Near-Infrared Camera toward the galaxy cluster MACS J1149.5+2223 and captured this image of hundreds of galaxies at varying distances and of different sizes, shapes, and colors—showing only a small section of the cluster.

See the full advent calendar here, where a new image will be revealed each day until December 25.

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