Our broadcasts of Happy Days, Three’s Company, and Charlie’s Angels are arriving there now. If advanced intelligent life has evolved in the TRAPPIST-1 system, they could already have detected our radio and television transmissions. The TRAPPIST-1 planets were the exception, they were assigned letters in order of distance after subsequent planets were discovered. Progressive lowercase letters are used (c, d, e and so on) when more than one planet is found in a system, with the letters assigned in order of discovery, not distance from the star. Video created with Starry Night Software.Īn exoplanet is named after the star it orbits, followed by a lowercase letter (starting with "b". A fly-by of the TRAPPIST-1 system planets.
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