A curated list of open source APIs, tools, and resources for accessing and analyzing space-related data. This list covers everything from satellite imagery to planetary science, making it ideal for developers, researchers, and space enthusiasts.

• General Resources
• Satellite Imagery APIs
• Planetary Science APIs
• Orbital Tracking APIs
• Space Weather APIs
• Astrophysics and Astronomy APIs
• Development Tools
• Educational Resources
• Community and Forums
• Contribute
• License

• NASA Open APIs - A collection of APIs from NASA, including imagery, Mars rover data, exoplanet databases, and more.
• ESA Open Data Portal - Provides access to European Space Agency data for Earth observation and planetary science.
• OpenSpaceData - A hub for open space-related data from various organizations.

• Sentinel Hub - Provides access to Sentinel satellite data and Earth observation imagery.
• Google Earth Engine - A geospatial platform for analyzing satellite imagery and other spatial datasets.
• OpenEO API - A standard API for accessing and processing Earth observation data.
• USGS Earth Explorer - Access to Landsat and other satellite imagery datasets via API.
• SkyWatch EarthCache - Simplified access to satellite imagery from various providers.

• NASA Mars Rover Photos API - Retrieve images taken by Mars rovers like Perseverance, Curiosity, and Opportunity.
• PDS Geosciences Node - Planetary Data System (PDS) for accessing geoscience data from NASA missions.
• Open Planetary Map - An open-source platform for planetary science maps and data.
• Mars Trek API - Explore Mars data through a web mapping service API.

• CelesTrak API - Provides data for tracking satellites and space debris.
• NORAD TLE Data - Two-Line Element sets for satellite orbit tracking.
• Space-Track API - Access to orbital tracking data, including NORAD objects.
• OpenSky Network API - Real-time data for tracking aircraft and satellites.
• Heavens-Above API - Data for tracking visible satellites and space objects.

• NOAA Space Weather Prediction Center - APIs for solar and geomagnetic activity.
• NASA Heliophysics Data - Data and APIs for studying the Sun and its interactions with Earth.
• Solar Dynamics Observatory (SDO) API - Access to solar observation data.
• Space Weather API - Real-time solar and geomagnetic activity data.

• SIMBAD Astronomical Database API - Data on celestial objects, including stars, galaxies, and nebulae.
• NASA Exoplanet Archive API - Access data on exoplanets and their host stars.
• Astroquery - A Python library for querying astronomical databases.
• TESS API - Data from the Transiting Exoplanet Survey Satellite (TESS).
• ESA Gaia Archive API - Access to the Gaia mission’s stellar catalog.

• AstroPy - A Python library for astronomy and astrophysics.
• PyEphem - A library for astronomy computations, including satellite tracking.
• GMAT (General Mission Analysis Tool) - An open-source tool for space mission analysis and design.
• SPICE Toolkit - A library for computing geometric and other parameters in space science.

• NASA Data Tutorials - Tutorials for accessing and using NASA’s data APIs.
• EarthData Tutorials - Learn how to use NASA Earth observation data.
• Google Earth Engine Developers Guide - A guide to using Google Earth Engine for geospatial analysis.
• Astroquery Documentation - Learn how to use Astroquery for querying space-related data.

• Reddit: r/Space - A subreddit for discussions about space and space technology.
• NASA Developer Network - A hub for developers working with NASA APIs.
• Space Stack Exchange - A Q&A site for space enthusiasts and professionals.
• AstroPython Slack - A Slack community for astronomy and astrophysics developers.

Contributions are welcome. Please ensure your submission fully follows the requirements outlined in CONTRIBUTING.md, including formatting, scope alignment, and category placement.

Pull requests that do not adhere to the contribution guidelines may be closed.