सारांश

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. File:Alpha Centauri relative sizes.png → File:Alpha Centauri relative sizes.svg For more information, see Help:SVG. In other languages Alemannisch ∙ Bahasa Indonesia ∙ Bahasa Melayu ∙ British English ∙ català ∙ čeština ∙ dansk ∙ Deutsch ∙ eesti ∙ English ∙ español ∙ Esperanto ∙ euskara ∙ français ∙ Frysk ∙ galego ∙ hrvatski ∙ Ido ∙ italiano ∙ lietuvių ∙ magyar ∙ Nederlands ∙ norsk bokmål ∙ norsk nynorsk ∙ occitan ∙ Plattdüütsch ∙ polski ∙ português ∙ português do Brasil ∙ română ∙ Scots ∙ sicilianu ∙ slovenčina ∙ slovenščina ∙ suomi ∙ svenska ∙ Tiếng Việt ∙ Türkçe ∙ vèneto ∙ Ελληνικά ∙ беларуская (тарашкевіца) ∙ български ∙ македонски ∙ нохчийн ∙ русский ∙ српски / srpski ∙ татарча/tatarça ∙ українська ∙ ქართული ∙ հայերեն ∙ বাংলা ∙ தமிழ் ∙ മലയാളം ∙ ไทย ∙ 한국어 ∙ 日本語 ∙ 简体中文 ∙ 繁體中文 ∙ עברית ∙ العربية ∙ فارسی ∙ +/−

 

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;

And I had the following TeX file as stars.tex:

%&latex
\documentclass[10pt]{article}
 \usepackage{graphicx}
 \pagestyle{empty}
\begin{document}
 \includegraphics{stars.1}
\end{document}

Then I ran

mpost stars
tex stars
dvips -mode ljfzzz -D 1200 stars -o
convert -density 1200 -chop 99999x99999+6249+3463 -chop 2479x2095 stars.ps stars.png
pngcrush -reduce -brute -l 9 stars.png stars.crush.png

stars.crush.png was the final output file.

(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.)

I, the copyright holder of this work, hereby publish it under the following licenses:

हो दस्तावेज Free Software Foundation हाच्या पालवान प्रकाशीत जी॰एन॰यू फ़्री डॉक्यूमेंटेशन लायसेंस जाल्ली आवृत्ती 1.2 वा नवें (खंयचोच इन्वेरियेंट भाग, आनी फाटलें वा फुडलें आवरणाच्या मजकूरे बगर) हाच्या अंतर्गत कॉपी, वितरण वा बदल करपाची परवानगी दितात. ह्या लायसेंसाची एक प्रत जी॰एन॰यू फ़्री डॉक्यूमेंटेशन लायसेंस नांवाच्या भागांत आस्पावीत केल्या.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue

	हाचे अंतर्गत ही फायल लायसेंस्ड आसा क्रिएटिव कॉमन्स एट्रीब्यूशन-शेयर एलाइक ३.० अनपोर्टेड़ लायसेंस ।
	तूं मेकळो आसा - वांटूंक – रचनेक कॉपी करूंक,वांटूंक आनी धाडूंक पुणर्मिश्रित करपाक – काम गरजेपरमणें अनुकुलीत करपाक सकयल दिल्ल्या अचींच्या अंर्तगत श्रेय – तुवें फावो तें श्रय दिवंक जाय, परवांगेक एक दुवो करुंक जाय, आनी कसलोय बदल केला जाल्यार दाखोवंक जाय. तुज्यान तें फावो ते परीं करुं येता, पूण ते परीं न्हय, ज्या वर्वीं दिसत की परवांगी दिवपी तुका वा तुंवे केल्ले उप्योगाक मान्यताय दिता म्हुण. अशेंच वांट – जर तूं ह्या रचनेन कसलेय बदल वा परिवर्तन करता वा हाचेर आदारीत कितेंय रचता जाल्यार तुवें तुज्या योगदानांक हेच लिसेंस, वा हाचें सारकेच लिसेंसाच्या अंतर्गत वांटूंक जाय.
	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.

तूं मेकळो आसा -

• वांटूंक – रचनेक कॉपी करूंक,वांटूंक आनी धाडूंक
• पुणर्मिश्रित करपाक – काम गरजेपरमणें अनुकुलीत करपाक

सकयल दिल्ल्या अचींच्या अंर्तगत

• श्रेय – तुवें फावो तें श्रय दिवंक जाय, परवांगेक एक दुवो करुंक जाय, आनी कसलोय बदल केला जाल्यार दाखोवंक जाय. तुज्यान तें फावो ते परीं करुं येता, पूण ते परीं न्हय, ज्या वर्वीं दिसत की परवांगी दिवपी तुका वा तुंवे केल्ले उप्योगाक मान्यताय दिता म्हुण.
• अशेंच वांट – जर तूं ह्या रचनेन कसलेय बदल वा परिवर्तन करता वा हाचेर आदारीत कितेंय रचता जाल्यार तुवें तुज्या योगदानांक हेच लिसेंस, वा हाचें सारकेच लिसेंसाच्या अंतर्गत वांटूंक जाय.

https://creativecommons.org/licenses/by-sa/2.0CC BY-SA 2.0 Creative Commons Attribution-Share Alike 2.0 truetrue

तुमी तुमकां जाय तो परवानो वेंचून काडात

References

• 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