C++14 library for astronomical calculations.
Still in an early phase of development, but here some samples of what it does so far
using namespace astro;
using namespace astro::literals;
namespace bpt = boost::posix_time;
bpt::ptime utc(bpt::second_clock::universal_time());
auto timeZone = bpt::hours(9) + bpt::minutes(30);
constexpr auto position = GeographicalCoords{
-(25_deg + 20_arcmin + 42_arcsec),
131_deg + 2_arcmin + 10_arcsec};
Observer<Earth> observer(JulianDate(utc), position);
Sun<Earth> sun(observer);
auto solarTimes = sun.getSolarTimesCalculator();
auto sunriseAndSunset = solarTimes.calculateSunriseAndSunset();
auto getLocalTime = [&timeZone](const JulianDate &date) {
return date.toPosixTime() + timeZone;
};
std::cout << "Noon = " << getLocalTime(solarTimes.getTransit()) << '\n';
std::cout << "Sunrise = " << getLocalTime(sunriseAndSunset.rise) << '\n';
std::cout << "Sunset = " << getLocalTime(sunriseAndSunset.set) << '\n';auto duskAndDawn = solarTimes.calculate(-18_deg);
std::cout << "Astronomical Dawn = " << getLocalTime(duskAndDawn.rise) << '\n';
std::cout << "Astronomical Dusk = " << getLocalTime(duskAndDawn.set) << '\n';Observer<Mars> observer(JulianDate(utc), {39.662_deg, -0.226_deg});
Sun<Mars> sun(observer);
std::cout << sun.getAltitude().deg() << '\n';