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Image: NASA/JPL-CalTech / Image: Nataly Mayak (Shutterstock) / Image: Hollie Adams (Reuters) / Image: NASA/JPL / Illustration: NASA/JPL-Caltech / Illustration: NASA/Aero Animation/Ben Schweighart / Photo:Chip Clark / Smithsonian Institution/ Photo: Alberto Menendez Cervero (Shutterstock) / Photo: George Dvorsky / Photo: NASA