What'll Be Even Weirder, Is If we Ever Discover Creatures, Who Evolved Under a Different Sun ...

In The Latest Book, In his Worldwar/Colonization Series, Harry Turtledove Reveals The Main Aliens, a.k.a. The Race or The Lizards, See TWO Colours In The Infra-Red, And Can't See Violet to Boot ...

Moreover, One of their Subject Species, The Halessi, Come From a Planet With an Even Redder Sun, And See a Further, Additional Colour in The Infra-Red, And Although it's Not Stipulated, Probably Can't Even See Indigo, Either!

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If you Ignore YOUR Rights, they Will go away.

Hmm, so violet leisure suits would be a good option for night time covert ops? However, in the last book I read of the series I believe they were still swapping nukes in the 1940's so I guess the leisure suit hadn't become style yet.

Probably ...

You REALLY Should Read, The Next Four Books In The Series ...

It's Now 2031, Humans have Reached The Planets of The Star Tau Ceti, And Advances In String Theory, Are Beginning to Yield Interesting Experimental Results!

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If you Ignore YOUR Rights, they Will go away.

I read where white tail deer are dichromatic (two color cones). They can see blue and slightly into the uv range with one, and, green and yellow with the other, IIRC. This plus their larger eyes, should allow them to see all the deer hunters as they sneak into their deer blinds. I don't know if these have evolved from unnatural selective pressure.

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.

The way I see it, we've evolved to see "white" things illuminated during the day as "white".
As they are illuminated both by the sun and the blue scattered light from the rest of the sky, the color we percieve as white is the color of the sun with some blue added, which is why the sun itself looks slightly yellow.

Had we evolved under a different star, or in an atmosphere with a different composition, I believe we'd have had an intensity curve experienced as white, but it would be very different from the one here.

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And the "driving on the freeway on a scooter" analogy still holds true because the pilots are sitting in 7 to 30 ton aircraft o' doom and you are running around them in your very own Meatbody, Mark I. Beep, beep.
Trying to make sense of computers, The Error Log.

Evolving to a white appearnce for daylight is interesting and makes sense.

However, surprisingly, the sun radiates with peak intensity in blue. The atmosphere does take about half of the blue, not just scattering effects though. The energy level for each wavelength (spectral irradiance) is almost flat when observing the sun from the surface.

It is also interesting to see a flat curve for the sun in space if the curve plots the distribution of photons (using E=h*nu).

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.

i think most kids draw the sun as yellow because when the sun starts to set, its easyer to look at, yet isn't casting crazy colors everywhere like it does when it's low enough to be red.

Even a little kid i think wouldn't beable to look at the sun at it's peak for long enough to think about what color it is, it just flat out hurts to look at it like that.

when kids see the sun lower in the sky, easyer to look at and beign turned yellow by going through the atmosphere, thats probably where they get the idea, not to mention all the "yellow" suns in marketing and their parents saying "here is a yellow crayon for drawing the sun!"

I agree, the sun is much more observable near the horizon, not only because of the pain factor but because it is so hard to not see it. Sunsets are often quite attractive.

The crayon factor is also very likely.

You might enjoy the master formula.

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.

Why not check to see if children colour the sun red in Japan?

Anyways, the sun is white. At least it is where I am here in Australia. It typically it gets a bit of a yellow tinge when it goes down. But usually that's just a tinge. I don't own a yellow crayon light enough to draw it. I imagine that a lot of people in the Northen hemisphere look at the sun through a lot more air and filth than here. I know in Japan the setting sun often looked like a filthy wobbly orange thing.

Interesting question. Perhaps the drawings they color only have a rising sun?

Anyways, the sun is white. At least it is where I am here in Australia. It typically it gets a bit of a yellow tinge when it goes down. [/quote]
I agree with the white sun appearance, though others see a midday sun as yellow-white. I would have guessed a dusty sunset would produce a orange-red sun for ya'll. A clean atmosphere is not thick enough in scattering material to produce a redish sun; dust or other material must exist in the sky, too.

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.

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All words, phrases, definitions and theories provided in the above post are, unless otherwise stated, the property of Champion Munch © 2005.

Sign up to sue the Sun

http://home.case.edu/~sjr16/advanced/sun_ourstar.html

Try this link...

This site is a good example why there is much confusion as to the sun's color.

Assuming 5014 Angstroms is correct for the peak intensity of the solar spectrum, and assuming the peak color determines what color the eye observes, it still would not be green. A monochromatic beam of light at 5014 Angstroms would appear cyan in color (blue green). It is possible, that the 5014 Angstrom value is wrong, too. I get about 5,850K as the Planck curve temperature by matching the sun's known spectral irradiance (AM0) to a Planck BB curve at 5850K. If this is correct, then the peak wavelength is 4954 Angstroms (blue). The actual spectral irradiance happens to have two peaks deeper into the blue end of the spectrum.

From the Hyperphysics solar irradiance graph, you can see the two peaks are located between 4500 and 4900 Angstroms. [I do not have an explanation for these, but they are there and are the actual peaks.]

The other assumption the article seems to make (that the color at peak intensity would produce the color the eye would behold) is likley false. [Albeit, there are times when the peak intensity does produce the color seen by the eye, but not in this case, IMO.] The eye/brain will combine all the colors it sees and then tell you the color. The other colors will blend together to produce a result. This is how a television scrren, or monitor, produces such a wide range of color - by combining the three color dots, each at different intensities. If the only color you saw was the strongest color dot illuminated, you would see everything as either red, green, or blue (using an RGB system), which we don't, of course.

It only appears yellow when the sun is close to the horizion due to the "bleaching", or removal, of more of the shorter wavelengths. This means the remaining longer wavelength colors will begin to dominate your view of the sun, which is why the sun, when closer to the horizon, appears orange and, in some cases, red.

Not to worry, heliochromology is still colorfully ramping-up to meet the needs of the world.

The very first article I read regarding the sun's true color claimed the sun was green. But, it is clear to me now, that it is not green because of the way the eye blends all the colors together, and because the peak isn't green, as I stated before.

This is correct, our eyes are more receptive to a light shade of green over any other color. You may have noticed emergency vehicles now being this color for this very reason. However, it does not cause the sun to appear green. The eye has three color cones, but they each see more than one color. The combined sensitivity of each gives light green the advantage, apparently.

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.

I have to say that even at the horizon, it is a rare occurence that it looks anything but white to me.

Perhaps your altitude makes a difference. The change in color of the sun requires several air masses to scatter enough of the shorter wavelength colors. Dust and other small particles greatly increase scattering, too. If mountains block a normal horizon view of a setting or rising sun, this would further decrease your chances for seeing color changes.

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.

True - the only time I see the sun truly at the horizon is in the morning - when it is setting, the mountains block it from about 3 degrees above the actual horizon. This might make some difference in appearance.

Though there is less dust in the air at sunrise, I would still think you would see a yellow rising sun. Is it usually white, or yellow-white (and not yellow)?

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Lighten up! This is a stellar board! Author: duh.

"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.

White, every single time I can remember (in normal conditions). It was definitely white this morning...

Can't remember ever seeing it yellow, though I can remember once (when there was a lot of smoke in the air from a forest fire) that it looked orange.

That is surprising. What color is the adjacent sky, during sunrise? Are you over a mile high?

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