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Summary
Español: Comparación del tamaño y color de las tres estrellas de Alfa Centauri con nuestro sol.
A comparison of the sizes and colors of the stars in the Alpha Centauri system with the Sun.
File:Alpha Centauri relative sizes.svg is a vector version of this file. It should be used in place of this PNG file when not inferior.
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David Benbennick made this image on January 29, 2005 with the following Metapost program as stars.mp:
verbatimtex
\font\foo=cmss9 at 10pt
\foo
etex
sunrad=0.3in;
alpharad = 1.227*sunrad;
betarad = 0.865*sunrad;
proximarad = 0.145*sunrad;
gap = 0.8*sunrad;
pair sunpos, alphapos, betapos, proximapos;
sunpos = (0 + gap + sunrad, 1.9*sunrad);
alphapos = sunpos + (sunrad + gap + alpharad, 0);
betapos = alphapos + (alpharad + gap + betarad, 0);
proximapos = betapos + (betarad + gap + proximarad, 0);
beginfig(1);
fill unitsquare xscaled ((xpart proximapos) + proximarad + gap)
yscaled (2 * (ypart sunpos));
fill fullcircle scaled (2*sunrad) shifted sunpos
withcolor (1,0.960,0.949); % Color is fff1ed
label.bot(btex Sun etex, sunpos - (0, sunrad)) withcolor white;
fill fullcircle scaled (2*alpharad)
shifted alphapos
withcolor (1,0.960,0.949);
label.bot(btex $\alpha$ Centauri A etex, alphapos - (0, alpharad))
withcolor white;
fill fullcircle scaled (2*betarad)
shifted betapos
withcolor (1,0.878,0.737); % ffe0bc
label.bot(btex $\alpha$ Centauri B etex, betapos - (0, betarad))
withcolor white;
fill fullcircle scaled (2*proximarad)
shifted proximapos
withcolor (1,0.752,0.411); % ffcc6f
label.bot(btex Proxima etex, proximapos - (0, proximarad))
withcolor white;
endfig;
end;
(Apparently it's non-trivial to get dvips to use a given resolution. I would have preferred to use 1600 dpi, but dvips didn't already have a "printer" at that resolution. ljfzzz, at 1200, was the best I could find.)
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Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue
This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
You are free:
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
I took the star colors from [1], which indicates they're only approximate. Apparently there are inherent difficulties in representing a star's color on a computer monitor.
I took the star radii from [2].
derivative works
Derivative works of this file:
Alpha Centauri relative sizes-it.png
Alpha Centauri relative sizes-nl.png
Alpha Centauri relative sizes-sv.png
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