Assertion: rotation | /r/HasProperty | discussed b. 1201
Facets:
value: by tusi
type: OTHER
value: at the maragha and samarkand observatories
type: LOCATION
Source sentences:
text: At the Maragha and Samarkand observatories, Earth's rotation was discussed by Tusi (b. 1201) and Qushji (b. 1403); the arguments and evidence they used resemble those used by Copernicus.