The Clouds of Neptune . ... Credit Copyright: H. Hammel ( MIT ) and NASA Explanation: These Hubble Space Telescope (HST) images reveal glimpses of the dynamic atmosphere of Neptune , the Solar System's most distant gas giant planet . ... These three pictures, taken during October and November 1994 when Neptune was only 2.8 billion miles distant, show the planet's characteristic aqua-blue colored atmosphere highlighted by pink, high altitude clouds and streaked with dark bands. ...