Keith Cooper is a freelance science journalist and editor in the United Kingdom, and has a degree in physics and astrophysics from the University of Manchester. He's the author of 'The Contact Paradox: Challenging Our Assumptions in the Search for Extraterrestrial Intelligence' (Bloomsbury Sigma, 2020) and has written articles on astronomy, space, physics and astrobiology for a multitude of magazines and websites.
Jam packed issues filled with the latest cutting-edge research, technology and theories delivered in an entertaining and visually stunning way, aiming to educate and inspire readers of all agesThe seven worlds of the TRAPPIST-1 planetary system make up one of our best chances for finding extraterrestrial life beyond our solar system.
The TRAPPIST-1 system contains a total of seven known Earth-sized planets. Three of them — TRAPPIST-1e, f and g — are located in the habitable zone of the star .. The innermost of TRAPPIST-1's planets, TRAPPIST-1b, orbits at a distance of 1.07 million miles , while the outermost planet, TRAPPIST-1h, orbits 5.78 million miles from the star. on one of these planets is equal in length to one year .
TRAPPIST-1d has a diameter of 6,246 miles — just 0.788 times that of Earth — and only 38.8% of Earth's mass. Its surface gravity is less than half our planet's gravitational pull, meaning it would be even more difficult for TRAPPIST-1d to hang onto its atmosphere. And even if it could,The TRAPPIST-1 planets get so close to one another that they would appear at least as large as the full moon in the sky, as seen here in this NASA poster.
However, the exoplanet's large mass means that it could more easily retain its atmosphere against the radiation from its star trying to blow it away. If it has lots of volcanism replenishing its atmosphere with greenhouse gases or a thick shroud of hydrogen helping to keep it warm, TRAPPIST-1g could still have an ocean as a so-called, orbits its star at a distance of 5.75 million miles , completing one orbit every 18.9 days. TRAPPIST-1h's smaller size of just 0.
Despite being jam-packed, all of the planets of TRAPPIST-1 are in stable, circular orbits and will not crash into one another. They do, however, get quite close sometimes — within twice the. This means that, if we were to stand on the surface of a TRAPPIST-1 planet, we'd see the other planets in the sky larger than we see our own moon from Earth.We don't know enough about TRAPPIST-1e to say if it's habitable for any type of life, let alone if humans could, theoretically, live there.
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