5/24/2023 O is for Observation
Tycho Brahe (1546-1601) was a pre-telescope Danish astronomer who looked at the sky more precisely than anyone before him had done. He was obsessively careful about measuring what he saw and he studied the sky every night he could. To accomplish what he wanted he reinvented and fine-tuned the sky-gauging tools of his era – sextant and quadrant.