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#1
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It's not easy being green
There are hot blue and violet stars, moderately hot orange and yellow
stars, and relatively cool red and brown stars. So where are the green stars? Rick |
#2
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As a stars color is based on how hot and the nuke fuel it's using, you will not
see green. the color green s made up of two other base colors, and as such will never see green stars. Brown is really a misleading color, in fact they are very very small cool stars that are just above the min mass needed to be a star, kind of like a object 25 times the size of Jupiter but not hot enough to reach the yellow stage. -- "In this universe the night was falling,the shadows were lengthening towards an east that would not know another dawn. But elsewhere the stars were still young and the light of morning lingered: and along the path he once had followed, man would one day go again." Arthur C. Clarke, The City & The Stars SIAR www.starlords.org Bishop's Car Fund http://www.bishopcarfund.Netfirms.com/ Freelance Writers Shop http://www.freelancewrittersshop.netfirms.com Telescope Buyers FAQ http://home.inreach.com/starlord "Rick" wrote in message ... There are hot blue and violet stars, moderately hot orange and yellow stars, and relatively cool red and brown stars. So where are the green stars? Rick --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.515 / Virus Database: 313 - Release Date: 9/1/03 |
#3
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As a stars color is based on how hot and the nuke fuel it's using, you will not
see green. the color green s made up of two other base colors, and as such will never see green stars. Brown is really a misleading color, in fact they are very very small cool stars that are just above the min mass needed to be a star, kind of like a object 25 times the size of Jupiter but not hot enough to reach the yellow stage. -- "In this universe the night was falling,the shadows were lengthening towards an east that would not know another dawn. But elsewhere the stars were still young and the light of morning lingered: and along the path he once had followed, man would one day go again." Arthur C. Clarke, The City & The Stars SIAR www.starlords.org Bishop's Car Fund http://www.bishopcarfund.Netfirms.com/ Freelance Writers Shop http://www.freelancewrittersshop.netfirms.com Telescope Buyers FAQ http://home.inreach.com/starlord "Rick" wrote in message ... There are hot blue and violet stars, moderately hot orange and yellow stars, and relatively cool red and brown stars. So where are the green stars? Rick --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.515 / Virus Database: 313 - Release Date: 9/1/03 |
#4
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"Starlord" wrote in message ...
As a stars color is based on how hot and the nuke fuel it's using, you will not see green. the color green s made up of two other base colors, and as such will never see green stars. Then how do you account for the myriad shades of orange, like our own sun which supposedly is a pinkish/peachy/orangey blend of red and yellow when seen from 1 LY away? Rick "Rick" wrote in message ... There are hot blue and violet stars, moderately hot orange and yellow stars, and relatively cool red and brown stars. So where are the green stars? Rick --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.515 / Virus Database: 313 - Release Date: 9/1/03 |
#5
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"Starlord" wrote in message ...
As a stars color is based on how hot and the nuke fuel it's using, you will not see green. the color green s made up of two other base colors, and as such will never see green stars. Then how do you account for the myriad shades of orange, like our own sun which supposedly is a pinkish/peachy/orangey blend of red and yellow when seen from 1 LY away? Rick "Rick" wrote in message ... There are hot blue and violet stars, moderately hot orange and yellow stars, and relatively cool red and brown stars. So where are the green stars? Rick --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.515 / Virus Database: 313 - Release Date: 9/1/03 |
#6
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Stars don't emit light of just a particular wavelength, but rather a broad
spectrum (see blackbody radiation). The easiest star colors to discern are therefore the ones at either end---blue for very hot stars (you don't see the ultraviolet light that's there with the rest) and red for very cool ones (you don't see the infrared). Our Sun's energy actually peaks in the green portion of the spectrum, but you don't perceive it as green because it's mixed in with light of various wavelengths on either side of it, causing it to appear white. Remember Netwon's prism? "Rick" wrote in message ... There are hot blue and violet stars, moderately hot orange and yellow stars, and relatively cool red and brown stars. So where are the green stars? Rick |
#7
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Stars don't emit light of just a particular wavelength, but rather a broad
spectrum (see blackbody radiation). The easiest star colors to discern are therefore the ones at either end---blue for very hot stars (you don't see the ultraviolet light that's there with the rest) and red for very cool ones (you don't see the infrared). Our Sun's energy actually peaks in the green portion of the spectrum, but you don't perceive it as green because it's mixed in with light of various wavelengths on either side of it, causing it to appear white. Remember Netwon's prism? "Rick" wrote in message ... There are hot blue and violet stars, moderately hot orange and yellow stars, and relatively cool red and brown stars. So where are the green stars? Rick |
#8
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Ah ok, that makes total sense. Thanks Bill.
"Bill Nunnelee" wrote in message .net... Stars don't emit light of just a particular wavelength, but rather a broad spectrum (see blackbody radiation). The easiest star colors to discern are therefore the ones at either end---blue for very hot stars (you don't see the ultraviolet light that's there with the rest) and red for very cool ones (you don't see the infrared). Our Sun's energy actually peaks in the green portion of the spectrum, but you don't perceive it as green because it's mixed in with light of various wavelengths on either side of it, causing it to appear white. Remember Netwon's prism? "Rick" wrote in message ... There are hot blue and violet stars, moderately hot orange and yellow stars, and relatively cool red and brown stars. So where are the green stars? Rick |
#9
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Ah ok, that makes total sense. Thanks Bill.
"Bill Nunnelee" wrote in message .net... Stars don't emit light of just a particular wavelength, but rather a broad spectrum (see blackbody radiation). The easiest star colors to discern are therefore the ones at either end---blue for very hot stars (you don't see the ultraviolet light that's there with the rest) and red for very cool ones (you don't see the infrared). Our Sun's energy actually peaks in the green portion of the spectrum, but you don't perceive it as green because it's mixed in with light of various wavelengths on either side of it, causing it to appear white. Remember Netwon's prism? "Rick" wrote in message ... There are hot blue and violet stars, moderately hot orange and yellow stars, and relatively cool red and brown stars. So where are the green stars? Rick |
#10
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Rick wrote:
There are hot blue and violet stars, moderately hot orange and yellow stars, and relatively cool red and brown stars. So where are the green stars? A star whose emissions are centred in the green part of the spectrum will seem white to us because the peak is pretty broad, including enough red and blue to make for a 'balanced' illuminant. To be seen as green a light source has to radiate only in a narrow band in the middle of the spectrum. Red stars give off a lot of IR, and blue stars UV; since we can't see those frequencies only the remaining ones contribute to our perception of the colour. -- Odysseus |
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