If you could stand on the surface of TRAPPIST-1f, what would you see? Of course,
no Earthling knows what you'd see on TRAPPIST-1f. However this illustration is based on observational data from the Spitzer Space Telescope.
From the planet's surface, near the terminator between night and day, you might see water, ice and rock on the ground, with clouds above. Beyond the clouds the star TRAPPIST-1 would be redder than our Sun, but look larger because its planets are much closer to it than we are to the Sun. The other planets in this system would also appear more like the way we see the Moon than the way we see our own planet companions. They look more starlike to us.
Illustration Credit: NASA, JPL-Caltech, Spitzer Team, T. Pyle (IPAC)