So what colour is Uranus really? |
So what colour is Uranus really? |
Oct 26 2006, 01:19 PM
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#1
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Member Group: Members Posts: 147 Joined: 14-April 06 From: Berlin Member No.: 744 |
Photos from the Voyager era show it to be on the border of blue and green, particularly greenish in some of them. On the other hand, amateur astronomers report from their backyards a definite "blue blob". So what colour would Uranus appear to human eye? Was the greenish tint made up as a distinction from Neptune? Or was it some flaw in image processing?
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Oct 27 2006, 02:06 AM
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#2
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Member Group: Members Posts: 656 Joined: 20-April 05 From: League City, Texas Member No.: 285 |
It's been 15-20 years since I last had a look at Uranus, but I recall it as a small but sharp and brilliant emerald green disc through the 6" reflector I had at the time. These days I have an 8" Celestron, but unable to get much use out of it due to the laser correction I had on my eyes a few years ago... wonderful vision in bright daylight, but bad flares and ghosting in the dark. Anyway I'm having plenty of fun with the math and software end of things these days.
Some of this perceived color variation may be due to the optical glass in the scopes and eyepieces. Part of it may be individual variation. I'm pretty sure that the true color is green, and blue for Neptune. Saturn of course has that nice golden hue, but I don't recall that Jupiter had any special color beyond levels of gray; the red spot never looked red to me. ...Uranus July 8, 2005... That last one was really nice, Kevin. Someday I need to try that image stacking thing. |
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