Best astronomy tools

Browse public NASA data APIs and use a shared key service for application access.

Solar-system ephemeris calculations with documented time spans

Instrument-specific observing calculations

NASA's child-focused articles, activities and games about Earth, space and technology.

Exoplanet records and mission data in a research archive

Telescope and camera calculations for observing setups

Search published astronomical catalogues and data tables

Space science and practical observing in one magazine

Astronomy advice, observing and equipment guides

Astronomical objects connected to literature and identifiers