text: const G = 6.67428e-11;              // Newtons*meters^2/kg^2, Universal Gravitational Constant
  const AU = 1.496e+11;                // meters, Astronomical Unit
  const STARSCALE = 10                        // number to scale up the size of the sun
  const PLANETSCALE = 1000                      // number to scale up the size of planets
  const PLUTOSCALE = 20000                     // because Pluto is so small
  const EARTHRADIUS = 6.371e6 * PLANETSCALE;    // Earth's radius
  const EARTHMASS = 5.9742e24;                // Earth's mass
  
  
  const Keplerian =
      "=====================================================================\n" +
      "  These data are to be used as described in the related document\n" +
      "  titled \"Keplerian Elements for Approximate Positions of the\n" +
      "  Major Planets\" by E.M. Standish (JPL/Caltech) available from\n" +
      "  the JPL Solar System Dynamics web site (http://ssd.jpl.nasa.gov/).\n" +
      "=====================================================================\n" +
      "\n" +
      "\n" +
      "Table 1.\n" +
      "\n" +
      "Keplerian elements and their rates, with respect to the mean ecliptic\n" +
      "and equinox of J2000, valid for the time-interval 1800 AD - 2050 AD.\n" +
      "\n" +
      "               a              e               I                L            long.peri.      long.node.\n" +
      "           AU, AU/Cy     rad, rad/Cy     deg, deg/Cy      deg, deg/Cy      deg, deg/Cy     deg, deg/Cy\n" +
      "-----------------------------------------------------------------------------------------------------------\n" +
      "Mercury   0.38709927      0.20563593      7.00497902      252.25032350     77.45779628     48.33076593\n" +
      "          0.00000037      0.00001906     -0.00594749   149472.67411175      0.16047689     -0.12534081\n" +
      "Venus     0.72333566      0.00677672      3.39467605      181.97909950    131.60246718     76.67984255\n" +
      "          0.00000390     -0.00004107     -0.00078890    58517.81538729      0.00268329     -0.27769418\n" +
      "EM Bary   1.00000261      0.01671123     -0.00001531      100.46457166    102.93768193      0.0\n" +
      "          0.00000562     -0.00004392     -0.01294668    35999.37244981      0.32327364      0.0\n" +
      "Mars      1.52371034      0.09339410      1.84969142       -4.55343205    -23.94362959     49.55953891\n" +
      "          0.00001847      0.00007882     -0.00813131    19140.30268499      0.44441088     -0.29257343\n" +
      "Jupiter   5.20288700      0.04838624      1.30439695       34.39644051     14.72847983    100.47390909\n" +
      "         -0.00011607     -0.00013253     -0.00183714     3034.74612775      0.21252668      0.20469106\n" +
      "Saturn    9.53667594      0.05386179      2.48599187       49.95424423     92.59887831    113.66242448\n" +
      "         -0.00125060     -0.00050991      0.00193609     1222.49362201     -0.41897216     -0.28867794\n" +
      "Uranus   19.18916464      0.04725744      0.77263783      313.23810451    170.95427630     74.01692503\n" +
      "         -0.00196176     -0.00004397     -0.00242939      428.48202785      0.40805281      0.04240589\n" +
      "Neptune  30.06992276      0.00859048      1.77004347      -55.12002969     44.96476227    131.78422574\n" +
      "          0.00026291      0.00005105      0.00035372      218.45945325     -0.32241464     -0.00508664\n" +
      "Pluto    39.48211675      0.24882730     17.14001206      238.92903833    224.06891629    110.30393684\n" +
      "         -0.00031596      0.00005170      0.00004818      145.20780515     -0.04062942     -0.01183482";
  
  
  export {EARTHMASS, EARTHRADIUS, G, AU, STARSCALE, PLANETSCALE, PLUTOSCALE, Keplerian };