The Solar System With Seven Earths: TRAPPIST-1

We’re also live on Spotify 🎧 https://open.spotify.com/show/033Dogu... Seven Earth-sized worlds orbit a star barely larger than Jupiter, and they all fit inside the orbit of Mercury. TRAPPIST-1 is the most tightly packed planetary system ever discovered, a gravitational machine so precise it has been ticking for billions of years and will outlast nearly every star in the universe. In this deep dive, we explore how a tiny robotic telescope in Chile's Atacama Desert first caught the flickering shadows of these worlds, why an ultra-cool red dwarf can host seven rocky planets without destroying them, and how all seven orbits lock into a single unbroken resonance chain, the longest ever found. We break down tidal locking, the alien skies you would see from these surfaces, what the James Webb Space Telescope has already revealed about their atmospheres, and why this dim red star will still be shining trillions of years after our Sun is dead. This is not a story about alien life. This is the story of the machine itself, and the single gravitational principle that built it, stabilizes it, and lets us read its secrets from forty light-years away. Sources: Gillon, M. et al. (2017). "Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1." Nature, 542, 456–460. https://doi.org/10.1038/nature21360 Agol, E. et al. (2021). "Refining the transit-timing and photometric analysis of TRAPPIST-1: masses, radii, densities, dynamics, and ephemerides." The Planetary Science Journal, 2(1), 1. https://doi.org/10.3847/PSJ/abd022 Greene, T.P. et al. (2023). "Thermal emission from the Earth-sized exoplanet TRAPPIST-1 b using JWST." Nature, 618, 39–42. https://doi.org/10.1038/s41586-023-05... Luger, R. et al. (2017). "A seven-planet resonant chain in TRAPPIST-1." Nature Astronomy, 1, 0129. https://doi.org/10.1038/s41550-017-0129 Turbet, M. et al. (2022). "A review of possible planetary atmospheres in the TRAPPIST-1 system." Space Science Reviews, 218, 51. https://doi.org/10.1007/s11214-022-00... #TRAPPIST1 #Exoplanets #SpaceScience #RedDwarf #OrbitalResonance #JamesWebbSpaceTelescope #PlanetaryScience