Package net.time4j.calendar.astro

package net.time4j.calendar.astro

Contains classes related to calendrical astronomy.

Interface Summary

Interface	Description
EquatorialCoordinates	Describes a celestial coordinate system which projects the earth equator and poles onto the celestial sphere using right ascension and declination in the reference frame J2000 as epoch.
GeoLocation	Describes a geographical position with latitude, longitude and optionally altitude.
SolarTime.Calculator	An SPI-interface representing a facade for the calculation engine regarding sunrise or sunset.

Class Summary

Class	Description
JulianDay	The Julian day is the Julian day number for the preceding noon plus the fraction of the day (counting 86400 seconds) since that instant.
LunarTime	Contains various routines to determine times of some moon events like moonrise or moonset.
LunarTime.Builder	Helper class to construct a new instance of LunarTime.
LunarTime.Moonlight	Collects all moon presence data for a given calendar date and zone of observer.
MoonPosition	Contains methods for calculating the position of the moon.
SolarTime	Contains various routines to determine solar time.
SolarTime.Builder	Helper class to construct a new instance of SolarTime.
SolarTime.Sunshine	Collects various data around sunrise and sunset.
SunPosition	Contains methods for calculating the position of the sun.
Zodiac.Event	Represents the event when the sun or moon enters or exits a zodiac.

Enum Class Summary

Enum Class	Description
AstronomicalSeason	The four astronomical seasons (Spring, Summer, Autumn and Winter).
MoonPhase	Enumeration of the four most important moon phases.
StdSolarCalculator	Enumeration of some standard calculators for solar time.
Twilight	Enumeration of various twilight definitions.
Zodiac	Enumeration of the thirteen astronomical zodiac definitions.