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Has the Sun's color changed?
Hi
I recently noticed that the sun is whiter than I used to remember it when I was a child. The sun I remember was yellow. A few weeks ago I was driving with sun in my eyes and the Sun looked very very white. Change in color could indicate many things, among those are change in the temperature of the sun, change in atmospheric condition on earth etc.. I wonder do any body have any data that measures sun's average radiation at any particular frequency or wave length? Does these levels vary with 11 year sun's cycle? This gave me the idea that the sun might have longer cycles than 11 years. These cycles could take say 100s or 1000s of years, and these cycles may have caused the climatological change on earth. Reagrds, Babak |
#2
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Has the Sun's color changed?
There are a chance this web page might explain the phenomena you are
describing. Everyone expeience this. chance are that you are very observant. http://www.psych.ucalgary.ca/PACE/VA...ite/monet.html Kind rgds vidar "Babak Sehari" skrev i melding ... Hi I recently noticed that the sun is whiter than I used to remember it when I was a child. The sun I remember was yellow. A few weeks ago I was driving with sun in my eyes and the Sun looked very very white. Change in color could indicate many things, among those are change in the temperature of the sun, change in atmospheric condition on earth etc.. I wonder do any body have any data that measures sun's average radiation at any particular frequency or wave length? Does these levels vary with 11 year sun's cycle? This gave me the idea that the sun might have longer cycles than 11 years. These cycles could take say 100s or 1000s of years, and these cycles may have caused the climatological change on earth. Reagrds, Babak |
#3
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Has the Sun's color changed?
Vidar In a book by Asminov he keeps reminding us when we are saying
the color blue we should be saying "violet" He claims we used blue for so long its to late to change. Much like man has tied weight and mass together. Bert |
#4
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Has the Sun's color changed?
"G=EMC^2 Glazier" wrote in message ... Vidar In a book by Asminov he keeps reminding us when we are saying the color blue we should be saying "violet" He claims we used blue for so long its to late to change. Much like man has tied weight and mass together. Bert Violet and Blue are very different colors Bert, what do you mean? This is like comparing orange and red. BV. |
#5
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Has the Sun's color changed?
No, the sun has not changed color significantly. It will become somewhat
redder in the distant future, but not over the period of a lifetime. To me, it looks about the same as it did as a child, although the yellowing of the eye's lens over time may cause a change in the perception of the color. Clear skies to you. -- David W. Knisely Prairie Astronomy Club: http://www.prairieastronomyclub.org Hyde Memorial Observatory: http://www.hydeobservatory.info/ ********************************************** * Attend the 10th Annual NEBRASKA STAR PARTY * * July 27-Aug. 1st, 2003, Merritt Reservoir * * http://www.NebraskaStarParty.org * ********************************************** |
#6
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Has the Sun's color changed?
I had cataract surgery several years ago. With the new plastic lens,
suddenly white is white! Bob "David Knisely" wrote in message ... No, the sun has not changed color significantly. It will become somewhat redder in the distant future, but not over the period of a lifetime. To me, it looks about the same as it did as a child, although the yellowing of the eye's lens over time may cause a change in the perception of the color. Clear skies to you. -- David W. Knisely Prairie Astronomy Club: http://www.prairieastronomyclub.org Hyde Memorial Observatory: http://www.hydeobservatory.info/ ********************************************** * Attend the 10th Annual NEBRASKA STAR PARTY * * July 27-Aug. 1st, 2003, Merritt Reservoir * * http://www.NebraskaStarParty.org * ********************************************** |
#7
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"BenignVanilla" wrote...
in message ... "G=EMC^2 Glazier" wrote in message ... Vidar In a book by Asminov he keeps reminding us when we are saying the color blue we should be saying "violet" He claims we used blue for so long its to late to change. Much like man has tied weight and mass together. Bert Violet and Blue are very different colors Bert, what do you mean? This is like comparing orange and red. BV. 'Lo BV -- Just one of the many Asimov quirks that made his writing more interesting than most. For example, he felt that the antielectron should never have been given the name "positron." It should simply be called an "antielectron," Period! But now, the name "positron" is far too engrained to be changed. I've read of several of these that Asimov considered to be "unfortunate" yet unchangable. And this includes the "blue shift" used to describe celestial objects that are moving in our general direction. When we analyze the visible light spectrum, the last color we come to as wavelengths are decreased is the color "violet." So Asimov wrote that scientists should have used "violet shift" to describe celestial objects moving toward us. Personally, i think we should go with "IR shift" instead of "red shift," and "UV shift" instead of either "blue" or "violet shift." "IR" is of course for "infrared," and "UV" is for "ultraviolet." So what do you think? Do you think the world of science is ready for this? g happy days and... starry starry nights! -- So watch as we go 'round in circles, Ending back where we began, And there's only one outcome For anyone's time-- Each of us getting a tan. Paine Ellsworth |
#8
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Ho Painius What reason is given for the photons waves getting shorter
coming towards us,and longer going away from us. I have an idea why this is reality for light. Bert |
#9
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"G=EMC^2 Glazier" wrote in message...
... Ho Painius What reason is given for the photons waves getting shorter coming towards us,and longer going away from us. I have an idea why this is reality for light. Bert Similar to the Doppler effect for sound, Bert... as railroad train approaches you blowing its whistle, the sound waves coming in your direction are "bunched up" together. This makes the train whistle sound higher pitched than it really is. Then, as the train passes you, the pitch lowers. This is because as the train heads away from you, the whistle's sound waves are "stretched apart." This gives the effect that the whistle frequency lowers. Now apply this like Fizeau did... shift toward blue end of visible spectrum means "higher frequency" and "shorter wavelength." Therefore object must be moving toward you. Shift toward red end of spectrum means "lower frequency" and "longer wavelength." So object must be moving away from you. What i have not figured out yet is how we can make the seemingly huge assumption that light waves will behave in this manner similar to sound waves. Any ideas? happy days and... starry starry nights! -- A Universe of Beauty Our Hubble often shows, Let's not forget our duty To pitch the way it Glows! Paine Ellsworth |
#10
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On Sat, 16 Aug 2003 08:51:43 GMT, "Painius" wrote:
"G=EMC^2 Glazier" wrote in message... ... Ho Painius What reason is given for the photons waves getting shorter coming towards us,and longer going away from us. I have an idea why this is reality for light. Bert Similar to the Doppler effect for sound, Bert... as railroad train approaches you blowing its whistle, the sound waves coming in your direction are "bunched up" together. This makes the train whistle sound higher pitched than it really is. Then, as the train passes you, the pitch lowers. This is because as the train heads away from you, the whistle's sound waves are "stretched apart." This gives the effect that the whistle frequency lowers. Now apply this like Fizeau did... shift toward blue end of visible spectrum means "higher frequency" and "shorter wavelength." Therefore object must be moving toward you. Shift toward red end of spectrum means "lower frequency" and "longer wavelength." So object must be moving away from you. What i have not figured out yet is how we can make the seemingly huge assumption that light waves will behave in this manner similar to sound waves. Any ideas? happy days and... starry starry nights! Because waves behaves like waves... In the beginning, Isaac proved that light travels as waves. Problem is that Albert Einstein proved that light travels as photons. They cannot both be right, no? Yes, they are, thanks to "mind boggling" quantum dynamic theory... Sometimes, light behave like waves and other times it behave like photons, just make sure you don't mix the two together at the same time! BTW, i am not sure but i think it is Doppler who got the idea for light waves and Fizeau who got it for sound waves. Benoît Morrissette |
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