My Assistant
Blue Sun On Mars |
Feb 11 2004, 03:47 PM
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![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 1465 Joined: 9-February 04 From: Columbus OH USA Member No.: 13 |
...and other stupid sundial tricks.
Take a look at this NASA-calibrated sundial image: http://tinyurl.com/create.php Zoomed: ![]() From that image the following RGB values are obtained: Ambient light (direct + scattered): 200:210:207 Scattered light: 87:72:60 Sky color: 194:169:161 So the direct light (i.e., direct sunlight) would be 200:210:207 minus 87:72:60 = 113:138:147 Scaled to max brightness: 196:239:255 (Sun color) Here's a graphic showing the sky color (194:169:161) vs. the sun color (196:239:255): ![]() Who knew? Joe -------------------- |
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Feb 11 2004, 09:23 PM
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Founder ![]() ![]() ![]() ![]() Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1 |
QUOTE (jmknapp @ Feb 11 2004, 04:20 PM) This is high noon--check the sundial. Oh - I know that - I was just saying that a blue coloured sun on mars isnt a new idea. BUT - i do think you're jumping to conclusions. as we've found with many many sets of images on this thing - we dont really have any clue of the real colours we're actually seing - and you have to account for things like the huge white pillar supporting pancam and navcam a few ft from the sundial that will be casting light onto the dial etc etc. Doug |
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jmknapp Blue Sun On Mars Feb 11 2004, 03:47 PM
djellison Well - it's very blue at sunset. Not sure on t... Feb 11 2004, 04:11 PM
jmknapp This is high noon--check the sundial. Feb 11 2004, 04:20 PM
SickNick Hey, y'wanna stare at the sun, here, and show ... Feb 11 2004, 07:06 PM
jmknapp Hi Doug,
Maybe you could point to some references... Feb 12 2004, 01:42 AM![]() ![]() |
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