OpenAstroChap01 (1).pptx - Survey of the Universe Chapter 1...

This preview shows page 1 - 6 out of 24 pages.

Survey ofthe UniverseClick here for textbookChapter1
Chapter 1Science and theUniverse: A Brief Tour
1.1 The Nature of AstronomyAstronomy is the study of thesky.Science is a progress report.Our understanding of sciencechanges as we get new data.The Orion Nebula
1.2 The Nature of ScienceModel:A simplified explanation of some natural phenomenon that can be used topredict future results. Example: The heliocentric model can be used to predict wherethe planets will be in the future.Hypothesis:A proposed explanation that is narrowin scope and based on evidence& reason. Example: The Nebular Hypothesis says our solar systemwas formed froma collapsing cloud of gas.Theory:a proposed explanation that is broadin scope and based on evidence &reason.Note: A theory is not an opinion! If someone dismisses a scientific theory as“just a theory”, they don’t know what a theory is.Example: The Nebular Theory says that planetary systems in generalare formedfrom collapsing clouds of gas.Law:A mathematicalrule that nature sometimes (or always) obeys. Example: fromKepler’s 3rdLaw, you can compute a planet’s orbital period from its orbital radius.
Notes on terminology:Model, Hypothesis, Theory, LawThere is considerableoverlapamong the above terms.In some cases, two or more of them are interchangeable.

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 24 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Summer
Professor
Bursick,S

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture