Kepler-186f Twilight Zone
“Standing on Kepler-186f, the rocky planet in the habitable zone of a red dwarf 500 light years away. The reddish twilight light bathes the foreground rocky terrain, ferns and lichens hypothetically photosynthesize with red-shifted light, a deep ocean shimmers in the distance, the red dwarf hangs low and large, and the system's other planets are visible as bright dots.”
