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Macintosh Picture Format  |  1994-03-09  |  195KB  |  640x480  |  8-bit (34 colors)
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OCR: ATmOS PHERE Data Uranus has cold hvdroaen- rich (83% by volume) atmosphere with a higher percentage of meth hane (2%) than any other planet. Most of the remainder of the atmosphere is composed of helium. Temperatures near the upper atmosphere (at the tops ot the clouds) 'average -353 F/ -214 59 K and wind speeds average 580 km (360 miles) per hour. These temperatures are so cold that even 'methane will condense from gas to - liquid it is proposed that overlying the cloud layers is a layer of liquid methane S this layer that causes the absortion of red and near infrared light, which 'in turn creates the planet blue green appearance The cloud layers are probably similar to those of Jupiter and Saturn with regions of ammonia ammounium hydro- sulfide and Water ice layers Howev rer these layers ...