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

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

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"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

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

"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

"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

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

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

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

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

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