Spitzer Space Telescope, one of agency’s great observatories, one of Spitzer’s great discoveries was that of the TRAPPIST-1 star, an ultra-cool dwarf, which has seven Earth-size planets orbiting it. via NASA https://ift.tt/2U23ciq January 27, 2020
NASA -Spitzer Observes TRAPPIST-1- January 27, 2020