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]
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current | 20:08, 6 April 2008 | ![]() | 600 × 600 (92 KB) | Inductiveload | {{Information |Description=A spatial representation of every star within 14 light-years of en:Sol. There are 32 stars in this region, including Sol. The stars are coloured according to the spectral type, which may not reflect the actual colour. Plea |
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