HST Observes High Altitude Clouds
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| HST Observes High Altitude Clouds These three images were taken on October 10, October 18 and November 2, 1994, when Neptune was 4.5 billion kilometers from Earth. Building on Voyager's initial discoveries, Hubble has revealed that Neptune has a remarkably dynamic atmosphere that changes over just a few days. The temperature difference between Neptune's strong internal heat source and its frigid cloud tops (-162� Celcius or -260� Fahrenheit) might trigger instabilities in the atmosphere that drive these large-scale weather changes. The pink features are high-altitude methane ice crystal clouds. |
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