Jerry
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Welcome! (start here)
Civil Wars
First Barons' War (1215–1217)
John, King of England (John Lackland Plantaganet)
Magna Carta (1215)
The Commons
Planetary Commons
Outer Space
Astronomy
Astrophysics
Parents
Astronomy
Physics
Children
Astrophysicists
Cosmology
Mass–luminosity relation
Poem to Launch an Astrophysics Graduate Seminar
The Surface of Last Scattering