As NASA’s Spitzer telescope’s mission ends, here’s a look back at its discoveries

For more than 16 years, the orbiting observatory has revealed wonders of the cosmos

Spitzer galaxy image

In a region 890 light-years across, hundreds of thousands of stars gather around dust clouds in the center of the Milky Way galaxy in this 2006 infrared image from the Spitzer Space Telescope.

JPL-Caltech/NASA, S. Stolovy, SSC

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