Talk:Stellar classification
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I have heard, that there are also green stars. How do they fit in this scheme?62.46.183.46
- There are no green stars. In some cases a white star orbiting an orange star may look greenish, but it is only due to the contrast. --Jyril 13:13, Mar 8, 2005 (UTC)
How exactly can the sun be yellow when it gives us full-spectrum (white) light?
- This isn't going to be a very scientific explanation, but here goes...
- The colours of the sun and other stars are usually described as we see them on Earth, i.e. through the atmosphere. The atmosphere itself (and particles of dust etc within it) absorbs some of the light and scatters and reflects some of it, which means that the colour of the light which passes through it changes - the more yellow part of the light is not absorbed. This absorption is also why the sky is blue (the gases in the atmosphere themselves do not give it this colour). The effect can be seen when comparing the appearance of the sun and sky at midday to their appearance at sunset. At sunset, the sun appears on the horizon and its light passes a greater distance through the atmosphere to reach you. More light is absorbed over this greater distance, making the sun and sky appear redder. Try Sky and Diffuse sky radiation (needs work...). If anyone can improve on this explanation and/or can think of a better place to put it, please do.
- SteveW 12:26, 8 Mar 2005 (UTC)
- Well Sun shines in every color, but the intensity is peaked in green and neighboring light so it gives us an impression of yellow. It is explained here (http://casa.colorado.edu/~ajsh/colour/Tspectrum.html). Here's (http://www.vendian.org/mncharity/dir3/starcolor/) info about the colors of stars -- you see the blue/white/yellow/orange/red classification isn't that accurate. Too bad it hasn't carbon star colors. They are truly red. --Jyril 13:13, Mar 8, 2005 (UTC)