Discoveryのインスタグラム(discovery) - 2月1日 01時43分

"After more than 16 years studying the universe in infrared light, revealing new wonders in our solar system, our galaxy, and beyond, NASA's Spitzer Space Telescope's mission has come to an end."
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Besides studying comets and asteroids in our solar system (plus a newly discovered ring around Saturn), Spitzer gave us a glimpse into the evolution of galaxies and the composition of interstellar dust. Perhaps it's best known discovery was detecting 7 Earth-size planets in the TRAPPIST-1 system.
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#SpitzerFinalVoyage
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Credit: @NASA

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