描述Nearby Stars (14ly Radius).svg	English: A spatial representation of every star within 14 light-years of Sol. There are 32 known stars in this region, including Sol. The stars are coloured according to the spectral type, which may not reflect the actual colour. Please see this Wikipedia article for the listing of stars. If a star is double or triple the stars are shown stacked vertically: the actual position is the star closest to the centre plane. The stars on this map may not all be visible to the naked eye, as many are dwarf stars. Some of this information may be preliminary and not entirely accurate as a result. The coordinate system is right ascension and declination. Hours of RA are marked, as well as distance in multiples of 5 light-years.
日期	2008年4月6日
来源	self-made, Mathematica, Inkscape. See also: http://www.daviddarling.info/encyclopedia/S/starsnearest.html
作者	Inductiveload
授权 (二次使用本文件)	Public domainPublic domainfalsefalse 我，本作品著作权人，释出本作品至公有领域。这适用于全世界。 在一些国家这可能不合法；如果是这样的话，那么： 我无条件地授予任何人以任何目的使用本作品的权利，除非这些条件是法律规定所必需的。
其他版本	македонски русский slovenščina українська Deutsch
SVG开发 InfoField	该SVG的源代码为无效代码，因为发现了6个问题。   本W3C无效的示意图使用Inkscape创作，或使用了其他工具。    此SVG 示意图使用了内嵌文本，可以使用任何文本编辑器轻松翻译。 优质图像 本图像已依据优质图像方针评估，被视为优质图像。 العربية ∙ جازايرية ∙ беларуская ∙ беларуская (тарашкевіца) ∙ български ∙ বাংলা ∙ català ∙ čeština ∙ Cymraeg ∙ Deutsch ∙ Schweizer Hochdeutsch ∙ Zazaki ∙ Ελληνικά ∙ English ∙ Esperanto ∙ español ∙ eesti ∙ euskara ∙ فارسی ∙ suomi ∙ français ∙ galego ∙ עברית ∙ हिन्दी ∙ hrvatski ∙ magyar ∙ հայերեն ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ Jawa ∙ ქართული ∙ Qaraqalpaqsha ∙ 한국어 ∙ kurdî ∙ кыргызча ∙ Latina ∙ Lëtzebuergesch ∙ lietuvių ∙ македонски ∙ മലയാളം ∙ मराठी ∙ Bahasa Melayu ∙ Nederlands ∙ Norfuk / Pitkern ∙ polski ∙ português ∙ português do Brasil ∙ rumantsch ∙ română ∙ русский ∙ sicilianu ∙ slovenčina ∙ slovenščina ∙ shqip ∙ српски / srpski ∙ svenska ∙ தமிழ் ∙ తెలుగు ∙ ไทย ∙ Tagalog ∙ toki pona ∙ Türkçe ∙ українська ∙ oʻzbekcha / ўзбекча ∙ vèneto ∙ Tiếng Việt ∙ 中文 ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−

raToTheta[{h_, m_, s_}] := 15*h + 15/60*m + 15/3600*s; decToPhi[{d_, m_, s_}] := 90 - (d + (m/60 + s/3600)*Sign[d]);  (*Returns celestial RA and Dec as radians in spherical coords*) celestialToSph[{{rah_, ram_, ras_}, {dd_, dm_, ds_}, dist_, name_}] :=   {    raToTheta[{rah, ram, ras}] Degree,    decToPhi[{dd, dm, ds}] Degree,    dist    };  (*Map Spherical coords to Cartesian*) sphereMap[{phi_, theta_, r_}] :=   {    r*Sin[theta] Cos[phi],    r*Sin[theta] Sin[phi],    r*Cos[theta]};  (*Produce a circle of radius r offset in the z axis by z*) offsetCircle[r_, z_] := ParametricPlot3D[    {r*Cos[t],     r*Sin[t],     z},    {t, 0, 2 Pi}];  (*Star list as {RA},{Dec},Distance,Name}*) starList =   {    {{0, 0, 0}, {0, 0, 0}, 0, "Sun"},    {{14, 29, 43}, {-62, 40, 46}, 4.2421, "Proxima Centauri"},    {{14, 39, 36.5}, {-60, 50, 02}, 4.3650, "\[Alpha] Centauri"},    {{17, 39, 35.1}, {4, 41, 36}, 5.9630, "Barnard's Star"},    {{10, 49, 18.7}, {-53, 19, 10}, 6.5880, "Luhman 16"},    {{10, 56, 29.2}, {7, 0, 53}, 7.7825, "Wolf 359"},    {{11, 3, 20.2}, {35, 58, 12}, 8.2905, "Lalande 21185"},    {{6, 45, 8.8}, {-16, 42, 58}, 8.5828, "Sirius"},    {{1, 39, 1.3}, {-17, 57, 01}, 8.7280, "Luyten 726-8"},    {{15, 41, 51.5}, {-22, 50, 25}, 9.3000, "Wise 1541-2250"},    {{18, 49, 49.4}, {-23, 50, 10}, 9.6183, "Ross 154"},    {{23, 41, 54.7}, {44, 10, 30}, 10.322, "Ross 248"},    {{3, 32, 55.8}, {-9, 27, 30}, 10.522, "\[Epsilon] Eridani"},    {{23, 5, 52}, {-35, 51, 11}, 10.742, "Lacaille 9352"},    {{11, 47, 44.4}, {0, 48, 16}, 10.919, "Ross 128"},    {{22, 38, 33.4}, {-15, 18, 7}, 11.266, "EZ Aquarii"},    {{07, 39, 18.1}, {5, 13, 30}, 11.402, "Procyon"},    {{21, 06, 53.9}, {38, 44, 58}, 11.403, "61 Cygni"},    {{18, 42, 46.7}, {59, 37, 49}, 11.525, "Struve 2398"},    {{1, 18, 22.9}, {44, 1, 23}, 11.624, "Groombridge 34"},    {{22, 3, 21.7}, {-56, 47, 10}, 11.824, "\[Epsilon] Indi"},    {{8, 29, 49.5}, {26, 46, 37}, 11.826, "DX Cancri"},    {{1, 44, 4.1}, {-15, 56, 15}, 11.887, "\[Tau] Ceti"},    {{3, 35, 59.7}, {-44, 30, 45}, 11.991, "GJ 1061"},    {{1, 12, 30.6}, {-16, 59, 56}, 12.132, "YZ Ceti"},    {{07, 27, 24.5}, {5, 13, 33}, 12.366, "Luyten's Star"},    {{2, 53, 0.9}, {16, 52, 53}, 12.571, "Teegarden's Star"},    {{18, 45, 5.3}, {-63, 57, 48}, 12.571, "SCR 1845-6357"},    {{5, 11, 40.6}, {-45, 1, 6}, 12.777, "Kapteyn's Star"},    {{21, 17, 15.3}, {-38, 52, 03}, 12.870, "Lacaille 8760"},    {{22, 27, 59.5}, {57, 41, 45}, 13.149, "Kruger 60"},    {{10, 48, 14.7}, {-39, 56, 06}, 13.167, "DEN 1048-3956"},    {{6, 29, 23.4}, {-2, 48, 50}, 13.349, "Ross 614"}      };  (*Get stars in {phi, theta, r} format*) starsDeg = Map[celestialToSph, starList, 1]; (*Map into the Cartesian space*) starPlot = sphereMap /@ starsDeg; stars = ListPointPlot3D[starPlot]; labels = Table[    Graphics3D[     Text[      starList[[i, 4]],      starPlot[[i]],      {-1.1, 0}      ]],    {i, 1, Length[starList]}]; posLines = Table[    Graphics3D[{Orange,      Line[       {{0, 0, 0},        {starPlot[[i, 1]], starPlot[[i, 2]], 0},        starPlot[[i]]}       ]}],    {i, 2, Length[starList]}]; gridhours = Graphics3D[    {Line[{{-20, 0, 0}, {20, 0, 0}}],     Line[{{0, -20, 0}, {0, 20, 0}}]}]; gridly = {offsetCircle[5, 0],    offsetCircle[10, 0],    offsetCircle[15, 0]}; viewDist = 20000; (*Distance of Viewpoint*) viewRA = 225 Degree; (*RA of viewpoint*) viewDec = 20 Degree;(*Dec of viewpoint*) Show[  labels,  posLines,  stars,  gridhours,  gridly,    BaseStyle -> {FontFamily -> "DejaVu Sans"},  PlotRange -> {{-15, 15}, {-15, 15}, {-12, 12}} {{QualityImage}},  SphericalRegion -> True,  Axes -> False,  BoxRatios -> {1, 1, 1},  Boxed -> False, (*ViewPoint -> {Sin[viewRA]*viewDist, Cos[viewRA]*viewDist,     Sin[viewDec]*viewDist},*)  (*ViewVertical -> {0, 0, 1},*)  AxesLabel -> {"x", "y", "z"},  ImageSize -> 1000]