File:Two Hours Before First Neptune Flyby (7544561540).jpg

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Description Two hours before closest approach to Neptune in 1989, the Voyager 2 robot spacecraft snapped this picture. Clearly visible for the first time were long light-colored cirrus-type clouds floating high in Neptune's atmosphere. Shadows of these clouds can even be seen on lower cloud decks. Most of Neptune's atmosphere is made of hydrogen and helium, which is invisible. Neptune's blue color therefore comes from smaller amounts of atmospheric methane, which preferentially absorbs red light. Neptune has the fastest winds in the Solar System, with gusts reaching 2000 kilometers per hour. Recent speculation holds that diamonds may be created in the dense hot conditions that exist under the clouds-tops of Uranus and Neptune.

Image #: P34709

Date: August 25, 1989
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Source Two Hours Before First Neptune Flyby
Author NASA on The Commons
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(Reusing this file)		 NASA on The Commons @ Flickr Commons

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This image was originally posted to Flickr by NASA on The Commons at https://flickr.com/photos/44494372@N05/7544561540. It was reviewed on 15 September 2016 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

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current19:41, 15 September 2016Thumbnail for version as of 19:41, 15 September 2016757 × 963 (77 KB)Vanished Account Byeznhpyxeuztibuo (talk | contribs)Transferred from Flickr via Flickr2Commons

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