Page 348 - 89 history of astronomy_opt
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In more modern times Nuremberg be-
came a centre of astronomical culture. Waltherus,
of that town, made really accurate observa-
tions of star altitudes, and of the distances
between stars; and in 1484 A.D. he used a
kind of clock. Tycho Brahe tried these, but
discarded them as being inaccurate.
Tycho Brahe (1546-1601 A.D.) made great
improvements in armillary spheres, quad-
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