Digest of NASA Image of the Day

This image shows two massive galaxy clusters. The vast number of galaxies and foreground stars in the image were captured by NASA’s James Webb Space Telescope in near-infrared light. Glowing, hot X-rays captured by NASA’s Chandra X-ray Observatory appear in pink. The blue represents the dark matter, which was precisely mapped by researchers with Webb’s detailed imaging.

The 57.7-foot-long Canadarm2 robotic arm extends from a data grapple fixture on the International Space Station’s Harmony module in this July 23, 2025, image.