Anscombe's quartetW
Anscombe's quartet
ChevalineW
Chevaline
January 1973 lunar eclipseW
January 1973 lunar eclipse
June 1973 lunar eclipseW
June 1973 lunar eclipse
July 1973 lunar eclipseW
July 1973 lunar eclipse
December 1973 lunar eclipseW
December 1973 lunar eclipse
Rosenhan experimentW
Rosenhan experiment
Solar eclipse of December 24, 1973W
Solar eclipse of December 24, 1973
Solar eclipse of January 4, 1973W
Solar eclipse of January 4, 1973
Solar eclipse of June 30, 1973W
Solar eclipse of June 30, 1973
Solis PlanumW
Solis Planum
Twin Earth thought experimentW
Twin Earth thought experiment
Uppsala General CatalogueW
Uppsala General Catalogue