The Wolfram Language provides seamless access to the curated and continuously updated Wolfram Knowledgebase used in Wolfram|Alpha—which includes a wide range of types of data for astronomical science. Free-form linguistics provide a convenient mechanism for accessing all available data; more common categories also have specific associated Wolfram Language functions.

Astronomical Computation

AstroPosition — compute and represent the positions of astronomical objects

AstroDistance — find the distance between astronomical objects

AstroAngularSeparation — find the angle between locations on the celestial sphere

SunPosition, MoonPosition — computed positions of Sun, Moon in the sky

AstroSubpoint — location on Earth having a celestial body directly above

OrbitalElements — compute properties of the orbits of planets, moons, asteroids, ...

Astronomical Events

FindAstroEvent — date and time of relevant astronomical events

"MarchEquinox"  ▪  "Conjunction"  ▪  "Perihelion"  ▪  "Appulse"  ▪  ...

AstroRiseSet — time of rise and set for any astronomical object

Sunrise, Sunset — time of sunrise, sunset for any location and date

ReferenceAltitude — option defining rise and set events, to compute twilight times

DayHemisphere  ▪  NightHemisphere  ▪  DayNightTerminator  ▪  DaylightQ

MoonPhase — phase of the Moon, given as numbers, icons, etc.

MoonPhaseDate — date of any phase of the Moon

NewMoon, FullMoon — date of new or full moon

SolarEclipse, LunarEclipse — detailed solar and lunar eclipse information

Time in Astronomy

SiderealTime — time measured by Earth's rotation with respect to the fixed stars

SolarTime — time measured by Earth's rotation with respect to the Sun

TimeSystemConvert — use different times systems: "UT1", "TT", "TAI", …

TimeZoneConvert, LocalTime — use different time zones

JulianDate, FromJulianDate — continuous count of days

LunationNumber, FromLunationNumber — continuous count of new moons

FindSolarEclipse — find solar eclipses covering a given location

Astronomical Visualization

AstroGraphics — build maps of the sky, as observed from a given location at a given time

AstroStyling — specify how to style the elements of a map of the sky

AstroBackground  ▪  AstroCenter  ▪  AstroGridLines  ▪  AstroGridLinesStyle  ▪  AstroProjection  ▪  AstroRange  ▪  AstroRangePadding  ▪  AstroReferenceFrame  ▪  AstroZoomLevel

Solar System Objects

Planet — solar system planets with static and dynamic properties

PlanetaryMoon — natural satellites in the solar system

SolarSystemFeature — craters and other features on solid solar system bodies

MinorPlanet — minor planets in the solar system, including dwarf planets

Comet — modern and historical observed comets with orbital parameters

MeteorShower — annual meteor showers visible from Earth

Stars, Galaxies, etc.

Star — stars in standard catalogs

Constellation — standard constellations as defined by various cultures

Exoplanet — confirmed planets beyond the solar system

StarCluster Nebula Pulsar Supernova AstronomicalRadioSource

Galaxy — galaxies and galaxy groups from standard catalogs

BlackHole — supermassive and stellar mass black holes

Spacecraft & Observatories

Satellite — artificial satellites in Earth orbit, including real-time computed positions

GeoVisibleRegion — region of Earth visible from a point in space

DeepSpaceProbe — planetary and deep space probes

MannedSpaceMission — all manned space missions to date

Rocket — launch vehicles and other rockets

AstronomicalObservatory — major astronomical observatories worldwide

Handling Entities

() — request data using free-form linguistics

EntityValue — general access to values of properties for all types of entities

Entity  ▪  EntityClass  ▪  EntityList  ▪  RandomEntity  ▪  EntityFunction  ▪  ...

Quantities & Units »

Quantity — symbolic representation of a quantity with units

Around — number or quantity with uncertainty

UnitConvert  ▪  UnitSimplify  ▪  UnitDimensions  ▪  ...

FromDMS  ▪  DMSList  ▪  DMSString

Astrophysical Computations

FormulaData — wide variety of astrophysical formulas

PlanckRadiationLaw — blackbody radiation

UniverseModelData — cosmological distances, structure and evolution

SpectralLineData — spectral lines of elements

Molecule  ▪  Element Chemical

Simulations

NBodySimulation — simulate idealized n-body systems