TRAPPIST-1 planets and habitable zones, illustration

TRAPPIST-1 planets and habitable zones, illustration

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Caption: TRAPPIST-1 planets. Illustrations comparing the habitable zone (green) of Earth's Solar System (bottom) with that of the TRAPPIST-1 system (top). The sizes of the planets are correctly to scale, but the ultra-cool dwarf star TRAPPIST-1 is about the size of Jupiter, and its planetary system has been enlarged 25 times here. Three planets (e, f, g) in the TRAPPIST-1 system are in its habitable zone, with liquid water potentially on their surfaces. Venus and Mars are on the edge of the Solar System's habitable zone. The TRAPPIST-1 system has been studied using NASA's Spitzer Space Telescope (SST) and the ground-based TRAPPIST (Transiting Planets and Planetesimals Small Telescope). TRAPPIST-1 is 39 light years from Earth, in the constellation of Aquarius. The planets were discovered in 2015 and 2017. Image published in 2017.

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Keywords: 2017, 2mass j23062928-0502285, aquarius, artwork, astronomical, astronomy, astrophysical, astrophysics, dwarf star, earth, exoplanet, extrasolar planet, habitable zone, illustration, inner, label, labeled, labelled, labels, life, liquid water, mars, mercury, no-one, nobody, orbit, orbiting, orbits, planet, planetary science, planetary system, planets, rocky, solar system, space, spitzer space telescope, sst, star, stellar system, terrestrial, text, tidally locked, transiting planets and planetesimals small telescope, trappist 1, trappist-1, trappist-1b, trappist-1c, trappist-1d, trappist-1e, trappist-1f, trappist-1g, trappist-1h, ultra-cool dwarf star, universe, venus

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