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First Barons' War (1215–1217)
John, King of England (John Lackland Plantaganet)
Magna Carta (1215)
The Commons
Planetary Commons
Outer Space
Astronomy
Astronomical Coordinate Systems
Galactic Coordinate System
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Galactic coordinate system - Wikipedia
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Astronomical Coordinate Systems
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Supergalactic Coordinate System
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Equatorial Coordinate System