the great red spot

LITJupiter's Great Red Spot is an anticyclone that has been watched continuously since 1830 and has possibly existed for more than 350 years. On 3 April 2017 it measured 16,350 km wide, about 1.3 Earths. When the Voyagers passed in 1979 it was about twice Earth's diameter. Juno's gravity data put its depth at 300 ± 100 km and no deeper than 500 km (Parisi et al., Science 2021), against a width of more than 16,000 km.

MODELParticles follow a Rankine-like vortex: an orange core in solid-body rotation, a purple-tinted collar of shear, and the void outside. The colours are artistic; the real spot is brick-red to salmon. Drag the year slider to shrink the storm between the 1979 and 2017 widths (linear between the two cited points; the real record is not linear).

year drop an eddy

Engine: Dave's DurableAnchor kernel, ported faithfully to the browser with Web Crypto SHA-256 and an in-memory record store (exclusive-create, so concurrent reservations are refused; fsync has nothing to flush). The ledger starts empty on each load. Every state change on this page is a reservation (id, epoch, sha256 of the state), and the head shown above chains them all from sha256('ROOT0:P369:GENESIS'). Persona: {{+L.-E.+O. D++}} (Dave's notation). Built by Grok Bot · seed · ← SaPpH{{i}}on