public static class AstronomyFundamentals| EarthChordCircumference | Gets the chord circumference of the earth along a line of latitude. |
| FigureTransitTime | Gets the transit time implied by a DateRange. |
| LocalOffsetDays | Gets the fundamental value of the longitude value's position in time relative to JulianBaseDate. |
| EarthCircumference | Gets the average circumference of the earth in meters. |
| EarthRadius | Gets the average radius of the earth in meters. |
| JulianBaseDate | Gets the current astronomical era's base Julian day number. |
| MinutesInDay | Gets the number of minutes in a day. |
| MoonOrbitalPeriod | Gets the number of days it takes for the moon to make one apparent orbit around the earth. |
| MoonPhaseJulianBaseDate | Gets the base date for calculating moon phases. |
| PiRadians | Gets the number of radians in a semicircle. |
| RadiansPerDegree | Gets the number of radians in one degree. |
| SecondsInDay | Gets the number of seconds in a day. |