![This data plot shows infrared observations by NASAs Spitzer Space Telescope of a system of seven planets orbiting TRAPPIST-1, an ultracool dwarf star. Over 21 days, Spitzer measured the drop in light This data plot shows infrared observations by NASAs Spitzer Space Telescope of a system of seven planets orbiting TRAPPIST-1, an ultracool dwarf star. Over 21 days, Spitzer measured the drop in light](https://inhabitat.com/wp-content/blogs.dir/1/files/2017/02/TRAPPIST-1-NASA-6-889x500.jpg)
This data plot shows infrared observations by NASAs Spitzer Space Telescope of a system of seven planets orbiting TRAPPIST-1, an ultracool dwarf star. Over 21 days, Spitzer measured the drop in light
![Spitzer's Legacy: One of NASA's Great Observatories Ends Its Mission - Sky & Telescope - Sky & Telescope Spitzer's Legacy: One of NASA's Great Observatories Ends Its Mission - Sky & Telescope - Sky & Telescope](https://skyandtelescope.org/wp-content/uploads/Fig.2_Spitzer_orbit-e1579717372806.gif)
Spitzer's Legacy: One of NASA's Great Observatories Ends Its Mission - Sky & Telescope - Sky & Telescope
![Spitzer's Legacy: One of NASA's Great Observatories Ends Its Mission - Sky & Telescope - Sky & Telescope Spitzer's Legacy: One of NASA's Great Observatories Ends Its Mission - Sky & Telescope - Sky & Telescope](https://skyandtelescope.org/wp-content/uploads/Fig1_north_american_neb_vis_ir-scaled-1.jpg)