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.
MoonPhase — phase of the Moon, given as numbers, icons, etc.
PlanetData — static and dynamic properties of solar system planets
StarData — positions and properties of all stars in standard catalogs
SatelliteData — properties and real-time computed positions of artificial satellites
GeoVisibleRegion — region of Earth visible from a point in space
DeepSpaceProbeData — planetary and deep space probes
EntityValue — general access to values of properties for all types of entities
FormulaData — wide variety of astrophysical formulas