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Uranus' color isn't green, it's greenish-blue, and so is Neptune's: Neptune and Uranus seen in true colours for first time
(www.bbc.com)
- Previous images of Neptune and Uranus, particularly from Voyager 2, were inaccurately blue and green due to image processing for detail enhancement.
- New research analyzed data from Hubble and VLT telescopes to reveal their "true" colors are both a similar shade of greenish-blue.
- Neptune still has a slightly bluer tinge due to a thinner haze layer.
- Uranus may appear slightly greener in summer/winter but bluer in spring/autumn due to its unique tilt.
- This research corrects a long-held misconception about these distant planets.
There already are, for example geography on Mars is areography and on the Moon it's selenography. This post has a list of some of them.
However, English is whatever we say it is, and most people just use "geography" for everything and specify "Martian geography" or "Lunar geography" when the distinction needs to be made.