https://www.usa.gov/government-works https://www.rawpixel.com/image/440537 Astronomers using NASA's Spitzer Space Telescope have detected what they believe is an alien world just two-thirds the size…

Astronomers using NASA's Spitzer Space Telescope have detected what they believe is an alien world just two-thirds the size of Earth, one of the smallest on record. Original from NASA. Digitally enhanced by rawpixel.

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