🛠️ Invention or technique

Jai Singh II's monumental astronomical instruments (Jantar Mantar)

Instrumentos astronómicos monumentales de Jai Singh II (Jantar Mantar)

Date
1728-1734 · confidence high
Place
Jaipur, Rajasthan, India
Credited to
Sawai Jai Singh II
People
👤 Jai Singh II1688–1743
Field
Cosmos & Earth

What it is

Masonry observatories in Delhi, Jaipur, Ujjain, Varanasi and Mathura, including the Samrat Yantra at Jaipur, a 27 m sundial accurate to about two seconds. They sought precision through scale rather than optics.

Jai Singh knew of the telescope but preferred large-scale naked-eye instruments, following the model of Ulugh Beg.

What it led to

  • Zij-i Muhammad Shahi astronomical tables
  • scientific heritage of Mughal and Rajput India
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