Tycho's 1586 Revolving Quadrant

Revolving wooden quadrant, 1.6 meter in radius, built in 1586

Revolving wooden quadrant, 1.6 meter in radius, built in 1586. Estimated accuracy of 32.3 seconds of arc, based on eight reference stars.

 

Bibliography:

Thoren, V.E. 1973, Journal for the History of Astronomy,4, 25.

Wesley, W.G. 1978, Journal for the History of Astronomy,9, 42.

 

Tycho