TRAPPIST-1 and Solar System size comparisons, illustration

TRAPPIST-1 and Solar System size comparisons, illustration

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Caption: TRAPPIST-1 and Solar System size comparisons. Illustration comparing the sizes of objects in the TRAPPIST-1 system and Earth's Solar System. The ultra-cool dwarf star TRAPPIST-1 (orange, diameter of 162,793 kilometres) is about the size of the Solar System's largest planet Jupiter (upper left, diameter of 139,822 kilometres). The Sun (partially shown at bottom right) has a diameter of 1.39 million kilometres. The inset boxes down left show the Galilean moons of Jupiter (Io, Europa, Ganymede and Callisto), the seven planets in the TRAPPIST-1 system (b-h), and the four planets of the inner Solar System (Mercury, Venus, Earth and Mars), all shown to scale. TRAPPIST-1 is 39 light years from Earth, in the constellation of Aquarius. Its 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, callisto, comparing, comparison, dwarf star, earth, europa, exoplanet, extrasolar planet, galilean moons, ganymede, habitable zone, illustration, inner, io, jovian, jupiter, label, labeled, labelled, labels, life, liquid water, mars, mercury, no-one, nobody, planet, planetary science, planetary system, planets, rocky, size, sizes, solar system, space, star, stellar system, sun, 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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