That’s right, “the belt took leaves of absence in both the early 1990s and in 1973, so its disappearance now, if anything, is a bit overdue (it seems to be on a roughly 15-year cycle). ” Video after the break.
Astronomers aren’t exactly sure why this happens, but the flightiness of the SEB is actually not unprecedented. Jupiter’s bands are actually clouds, with the SEB being primarily made up of ammonia ice, sulfur, and phosphorous hovering above the planet’s toxic, gaseous surface.
[phpzon]Jupiter, 2, Books[/phpzon]