Photo Puzzle: 20th Anniversary of Human Habitation on International Space Station

This scrambled image is the 2020 International Space Station Configuration. We’re celebrating 20 years of continuous human presence on the ISS. The ISS provides a platform for long-duration research in microgravity, and it is key to our further understanding of future missions to the Moon and Mars.

Orbiting the Earth every 90 minutes at about 17,500 mph (28,000 km/h), you can view the ISS with the naked eye.

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