TRAPPIST-1
dwarf star
Quick Summary
Learn how the planets of Trappist-1 were discovered and about their potential for liquid water and life
Learn about the discovery of exoplanets in the TRAPPIST-1 system in this 2017 video from NASA's Jet Propulsion Laboratory. The planets were discovered by scientists using the Spitzer Space Telescope and several ground-based telescopes.
TRAPPIST-1 is a system featuring an ultracool dwarf star, which is a star of low luminosity, mass, and size. This star is orbited by seven Earth-sized planets, three of which are located within the star's habitable zone. Dwarf stars can range in color from blue to red, with corresponding temperatures varying from high to low. Extrasolar planets, like those in the TRAPPIST-1 system, are planetary bodies outside our solar system that orbit stars other than the Sun.12
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