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2020/2/4Lesson 14 – Properties and Evolution of Stars1/21Lesson 14 – Properties and Evolution of StarsSite:UNSW MoodleCourse:PHYS1160-Introduction to Astronomy Summer Term 2020Book:Lesson 14 – Properties and Evolution of StarsPrinted by:(Hilary) Junting XieDate:Tuesday, 4 February 2020, 8:05 PM
2020/2/4Lesson 14 – Properties and Evolution of Stars2/21DescriptionIn this lecture we're going to look at the properties and evolution of stars. We'll look at the important properties of stars: we'll look at spectroscopicclassification of stars – how we classify them into different spectral types. We'll look at something called Hertzsprung-Russell Diagram, which is a diagramthat helps to make sense of different types of stars. And we'll look at the evolution of stars – how stars change over time.
2020/2/4Lesson 14 – Properties and Evolution of Stars3/21Table of contents14. Properties and Evolution of Stars14.1 Basic Properties of Stars14.2 Luminosity and Distance14.3 Colour, Temperature and Spectroscopic Classification14.4 Spectral Classification - Some History14.5 Mass14.6 The Hertzprung-Russell Diagram14.7 Binaries, Variables and Star Clusters
2020/2/4Lesson 14 – Properties and Evolution of Stars4/2114. Properties and Evolution of StarsSHOW WHOLE LESSON AS SINGLE WEB PAGEGO TO FIRST PAGE
2020/2/4Lesson 14 – Properties and Evolution of Stars5/2114.1 Basic Properties of StarsIn this lesson we're going to look at the properties and evolution of stars. We'll look at the important properties of stars and spectroscopic classification –how we classify them into different spectral types. We'll look at something called the Hertzsprung-Russell Diagram, which is a diagram that helps to makesense of different types of stars. And we'll look at the evolution of stars – how stars change over time.Our Sun is one of billions of stars in our Galaxy. How do we make sense of this huge number of stars? Well, it helps to measure their basic properties, and tolook for patterns that help us classify them.There are three important properties of stars:Mass:A key property is a star's mass – the total amount of material in the star. This turns out to be a difficult property to measure.Luminosity:Another key property is luminosity - the rate of energy production from a star or equivalently, the power the star emits. We call very luminousstars "giant" or even "supergiant" stars. Less luminous stars (like the Sun) are "dwarf" stars.Colour or Temperature:Another property is a star's colour or temperature (which turn out to be related). Red stars are very cool stars, with temperatures ofabout 3000 K. At hotter and hotter temperatures we go through yellow stars like the Sun (with a temperature of about 5800 K), and the hottest white and

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Term
Three
Professor
Bailey
Tags
Multiple Stars, Evolution of Stars

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