tag #atmosphere 1 reading card on “atmosphere”, in chronological order. Part of the full archive. 2026-05-07 Noctilucent Clouds Ice crystals at the edge of space, glowing after sunset. There is a kind of cloud you can only see when the Sun has already set on you but is still rising on it. Eighty kilometres up, in air drier than any desert, ice has somehow learned to form.
