Observational history Time-lapse sequence from the approach of Voyager 1 to Jupiter Early astronomers, using small telescopes with their eyes as detectors, recorded the changing appearance of Jupiter’s atmosphere.  Their descriptive terms—belts and zones, brown spots and red spots, plumes, barges, festoons, and streamers—are still used.  Other terms such as vorticity, vertical motion, cloud heights have entered in use later, in the 20th century.  The first observations of the Jovian atmosphere at higher resolution than possible with Earth-based telescopes were taken by the Pioneer 10 and 11 spacecraft. The first truly detailed images of Jupiter's atmosphere were provided by the Voyagers .  The two spacecraft were able to image details at a resolution as low as 5 km in size in various spectra, and also able to create "approach movies" of the atmosphere in motion.  The Galileo probe saw less of Jupiter's atmosphere, but at a better average resolution and a wider spectral bandwidth. 
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