Astro 2022 Week 13 - Astronomy Week 13 Day 1 Aristotle and ancient Greeks gave us the spherical Earth and geocentric universe Renaissance astronomers

Astro 2022 Week 13 - Astronomy Week 13 Day 1 Aristotle and...

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Astronomy, Week 13 Day 1Aristotle and ancient Greeks gave us the spherical Earth and geocentric universeRenaissance astronomers & physicists developed the idea of a heliocentric and changing universe governed by physics“Science is a history of corrected mistakes” –Karl PopperoThe revision of general principles is what makes science different than other approaches Our knowledge of the universe before 10-43seconds is limited because our current theories of physics does not work well thereTry to extend the understanding of physics to T=O, we get a SingularityoA condition where laws break downoImagine a dark hole compressing so that volume becomes singularoDensity = mass/volume  mass/0 is undefined oPenrose & Hawking showed that general relativity implies that there must have been a singularity in the pastHartle and Hawking showed that with quantum mechanics the singularity could be avoided (rounded tip instead of singularity)

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