Real-time 3D visualization of space
https://celestiaproject.space/forum/
https://celestiaproject.space/forum/viewtopic.php?f=23&t=20415
trappistplanets wrote:Ooof
the color of your gstar texture is to yellow
look at FGN's texture
its a whitish color
in reality g-type stars are white not yellow
from Earth or from space ? 
in space g-type stars are not yellow there whitejujuapapa wrote:All depends of your point of view... from Earth or from space ?
trappistplanets wrote:by trappistplanets ยป Today, 07:14
in space g-type stars are not yellow there white
so that texture needs fixing
And A-type star, what is its color ? Transparent ?trappistplanets wrote:in space g-type stars are not yellow there whitejujuapapa wrote:All depends of your point of view... from Earth or from space ?
so that texture needs fixing
False, white !SevenSpheres wrote:Bluejujuapapa wrote:And A-type star, what is its color ? Transparent ?
jujuapapa wrote:False, white !
Blue is for O and B type stars.
http://vendian.org/mncharity/dir3/starcolor/details.html wrote:
> > > Descriptions of stellar types often say things like "yellow".
> > Those 'yellow' stars are white, and what are usually termed 'red' stars are
> > yellow to yellow-orange. Stellar types are defined using for calibration the
> > blue star Vega, which provides an extremely simple spectrum at the '0'
> > magnitude. The colors assigned stars were never intended to have any
> > relationship to reality, but simply showed the temperature relative to Vega.
> > Thus we have the seeming absurdity of our overwhelmingly, brilliantly white
> > Sun being called a 'yellow' star.
> Fascinating. What an unfortunate naming scheme.
> I wonder if it started out fully qualified ("Vega-yellow", "yellow
> relative to Vega"), and then degraded, or whether correct interpretation
> always presumed domain knowledge. At this point, judging by some of the
> colors used in stellar type tables by astronomers teaching intro
> astronomy classes, this context is sometimes forgotten even within the
> profession. And outside... what a mess.
It did [presume domain knowledge], but that 'domain' was originally
comprised of astronomers doing photometry who would presumably
understand the system.
jujuapapa wrote:Just remember only this :
A basic scientific document since several centuries...
SevenSpheres wrote:You're claiming that an H-R diagram with Vega-relative colors is a more authoritative source than Mitchell Charity's and Askaniy's work on spectra (which have been and will be used in Celestia)?
Color gradients like the D65 Spectrum are shown to be better approximations of true blackbody colors than a Vega-relative spectrum... For example here's the approximate color of Vega on a D65 gradient, where you can see Vega is clearly a blue color.jujuapapa wrote:Yes !
I'm well aware of that, but that's the highest GD would let me set the noise scale. That scale also lets me tweak the granule noise without having to re-bake the texture every time, as GD only shows a low-res preview while you're editing.FarGetaNik wrote:The sun's granules are way smaller than that.
, less 20 years old and they knew their grandfather as a young man! !!!