ASTR 101 Lecture Notes - Lecture 12: Astronomical Unit
7 Oct 2016
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Observed comet and invited others from another location to describe what they saw. From lack of measurable parallax, he proved that the comet was farther away than the moon, not in the atmosphere. Most important contribution: accumulated lots of data (real reliable data), had precise measurements (repeated over and over again), and built the very best instruments (though not telescopes), and had wisdom to hire kepler. Legacy: believed in a hybrid model; static earth with moon and sun orbiting us, but all other planets orbit the sun (would explain why we see no stellar parallax) Tycho was dying, and wished kepler would prove that he was right. Shakespearean connection: tycho"s coat of armour had rosenkrantz and. Used tycho"s data to work out shape and relative size of planetary orbits. Assumed earth"s orbits around the sun is a circle (kind of justi ed by the fact that the. Sun look roughly the same size year round)
