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Space station twins

José Zarcos Palma, taken from Achada do Gamo, Portugal

The International Space Station and the Chinese space station Tiangong glide across the sky in this stacked image covering roughly 24 minutes on the evening of July 24, 2025. The ISS appears as the lower arc; Tiangong appeared higher in the sky just 13 minutes later. The photographer used a Sony mirrorless camera and 8mm fisheye lens at f/2.8, taking 15-second exposures at ISO 100. The foreground is a single 30-second exposure at ISO 3200.