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Encyclopedia · 30 satellites · 11 constellations

Artificial Satellites

The satellites that watch the Earth, connect the world, and navigate the planet — connected through the Knowledge Graph to the agencies that operate them, the rockets that launched them, the launch sites they flew from, and the orbits they occupy.

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Orbit types

Where satellites fly, and why it matters.

Operators

The space agencies, civil bodies, and companies behind the satellites.

Tracking networks

Satellite constellations

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  • BeiDouOperational

    China's global navigation satellite system, using a mix of medium-Earth, geostationary, and inclined geosynchronous orbits.

    OperatorCNSAOrbitMEOSize≈ 35 satellites across MEO, GEO, and inclined geosynchronous orbits
  • BlackSky GlobalActive

    A commercial low-Earth-orbit constellation delivering rapid-revisit, high-cadence Earth imagery.

    OperatorBlackSkyOrbitLEO
  • Galileo (navigation system)Operational

    Europe's civil global navigation satellite system — owned by the EU and operated through EUSPA, with ESA as the design and procurement agent — offering high-accuracy positioning independent of GPS.

    OperatorEuropean Union (EUSPA / ESA)OrbitMEOSize≈ 24 operational satellites plus spares
  • GlobalstarActive

    A low-Earth-orbit satellite-phone and data constellation serving voice, messaging, and IoT connectivity.

    OperatorGlobalstarOrbitLEO
  • GLONASSOperational

    Russia's global navigation satellite system, providing worldwide positioning and timing from medium Earth orbit.

    OperatorRoscosmosOrbitMEOSize≈ 24 operational satellites
  • GPS (Global Positioning System)Operational

    The United States' global navigation satellite system, providing worldwide positioning, navigation, and timing from medium Earth orbit.

    OperatorUnited States Space ForceOrbitMEOSize≈ 31 operational satellites
  • Iridium NEXTActive

    The second-generation Iridium constellation of 66 cross-linked low-Earth-orbit satellites providing pole-to-pole voice and data coverage.

    OperatorIridium CommunicationsOrbitLEOSize66 operational satellites plus on-orbit spares
  • O3bActive

    SES's medium-Earth-orbit broadband constellation delivering low-latency connectivity to telecom, maritime, and enterprise customers between the tropics and beyond.

    OperatorSESOrbitMEO
  • OneWebActive

    A low-Earth-orbit broadband constellation providing global connectivity, focused on enterprise, government, and maritime users.

    OperatorOneWebOrbitLEOSize≈ 630 first-generation satellites
  • Planet Dove (Flock)Active

    Planet Labs' fleet of shoebox-sized Dove CubeSats that image the entire land surface of the Earth daily at medium resolution.

    OperatorPlanet LabsOrbitSSOSizeHundreds of small CubeSats
  • StarlinkActive

    SpaceX's low-Earth-orbit broadband internet constellation, the largest ever built, delivering global high-speed connectivity.

    OperatorSpaceXOrbitLEOSizeThousands of satellites — the largest constellation ever deployed

Data & provenance

Each satellite, constellation, orbit type, operator, and tracking network is a first-class knowledge-graph entity resolved through the Scientific Data Engine. Agencies, launch vehicles, and launch sites are the platform's existing, source-backed entities — reused, never duplicated. This encyclopedia performs no real-time tracking and states no live positions; where a satellite is observable, it links to the computed Live Sky tools. Unknown values are left blank. See source quality.