Orrery, 1910-1920.

Celestial globe, 1878.

Celestial globe, 1878.

Celestial globe, 1878.

Celestial globe, 1878.

Graphometer, 18th century.

Celestial globe, 1693.

Celestial globe, 1693.

Celestial globe, 1693.

Italian circumferentor ('ipodimeter') with eccentric alidade, 17th century.

Nocturnal, English, late 17th-early 18th century.

Goa stone, Europe, 17th century.