In 1995, after 6 years of travel to Jupiter, the atmospheric entry probe on the Galileo spacecraft descended into the atmosphere of Jupiter. Near the top of Jupiter’s troposphere at a temperature of about –140°C (about 130 K), it found that ammonia had condensed. Next it found a layer of ammonium hydrosulfide clouds at a temperature of about –80°C (about 190 K). Soon after, information from the probe ended. (While descending slowly via parachute to an atmospheric pressure of 22 bars and a temperature of about 100°C [373 K], the Galileo probe failed, presumably because its transmitter got too hot.) What lies below this level in Jupiter’s atmosphere must for now be left to theories and atmospheric models.