Assertion: observation | /r/AtLocation | fifth century
Facets:
value: down to that of copernicus
type: OTHER
value: brahe in the sixteenth century a.d.
type: TEMPORAL
value: from time
type: TEMPORAL
Source sentences:
text: From the time of Thales of Miletus, in the fifth century B.C., down to that of Copernicus in the fifteenth and Tycho Brahe in the sixteenth century A.D., observations have been from time to time carried on with more or less correctness, until in the present day the altitudes of the lunar mountains have been determined with exactitude.