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Chapter 1The Nature of AstronomyAstronomy– study of objects that lie beyond Earth and the process bywhich these objects interact with one anotheroHumanity’s attempt to organize clear history of universeUniverse made ofcarbon, calcium, oxygenThe Nature of ScienceScience =methodwhich we attempt to understand nature and how itbehavesAncient astronomers thought Earth was center oof universe andeverything moved around it in circular orbitsoBUT with improved instruments provedsun= centerHypothesis= new models or ideasoEx: stuff about dark energyoMust be proposed explanation that can be testedoIf experimental result is inconsistent with hypothesis, scientistmust discard hypothesis and develop alternativeIf results agree with prediction, does not prove hypothesisis absolutely correctAstronomy =observational science– make tests by observingsamples of kind of object we want to stdy and noting carefully howdifferent samples varyAstronomy =historical science– what we observe has alreadyhappened in the universe and we can do nothing to change itAstronomer similar to detective – both must sift through evidence andconvince othersoPeer review– careful examination by other scientists in thesame fieldLaws of NatureScientific laws– from observations, hypotheses and experimentsoRules of the game that nature playsSame laws apply everywhere in the universeoLaws and scientific models can changeScientists prefer to describe models using equations rather than wordsNumbers in AstronomyScientific notation

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Term
Spring
Professor
N/A
Tags
Solar System, Planet

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