So what colour is Uranus really? |
So what colour is Uranus really? |
Oct 26 2006, 01:19 PM
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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, 01:06 PM
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#2
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Member Group: Members Posts: 510 Joined: 17-March 05 From: Southeast Michigan Member No.: 209 |
I've always seen it as greenish through my battery of 'scopes (80mm/8"/12.5"), especially when compared to Neptune in the same session, as JRehling notes. Now is a good time to try that, with both of them hanging out relatively close to each other in Aquarius & Capricornus in the early evening.
Jupiter's red spot has been very pale for the last several years, and they way I've detected it most often is by the gap it makes in the SEB. Find the gap first, then concentrate on it and the spot becomes a little more apparent. It certainly doesn't hit you over the head these days. But as others have noted, we are using our own built-in biological photodetectors in the end, and they have their quirks. This discussion reminds me of the whole green star question, but we're dealing with emitted light there. Interesting stuff! -------------------- --O'Dave
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